Mount Grosser Mythen (1,898 m/6,227 ft above sea level) is seen in the background as passengers watch through a window while riding down with the Stoosbahnen funicular near the village of Stoos, Switzerland July 12, 2018. Picture taken with a fisheye lens. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen on the illuminated track before the opening ceremony near the Alpine resort of Stoos, Switzerland December 15, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken December 13, 2017. REUTERS/Arnd Wiegmann TPX IMAGES OF THE DAY

The barrel-shaped carriages of a new funicular line are seen front of mount Grosser Mythen (1,898 m/6,227 ft above sea level) during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

A skier in front of mount Grosser Mythen (1,898 m/6,227 ft above sea level) and the barrel-shaped carriages of a new funicular line are seen during sunny winter weather on a piste in Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen front of mount Grosser Mythen (1,898 m/6,227 ft above sea level) during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The barrel-shaped carriages of a new funicular line are seen during sunny winter weather in the Alpine resort of Stoos, Switzerland December 13, 2017. Picture taken on December 13, 2017. REUTERS/Arnd Wiegmann

The Verticalp funicular arrives at the Emosson dam, which produces electricity for Swiss Rail (SBB), in Emosson, Switzerland August 9, 2017. REUTERS/Denis Balibouse

A view shows the city funicular in central Kiev, Ukraine, April 20, 2017. REUTERS/Valentyn Ogirenko

A funicular railway station is seen in Tbilisi, Georgia, June 10, 2016. REUTERS/David Mdzinarishvili

The Rosa Khutor Alpine Resort is pictured through the glass of a funicular during heavy rain in Krasnaya Polyana near Sochi January 21, 2014. Sochi will host the 2014 Winter Olympic Games from February 7 to 23. REUTERS/Alexander Demianchuk (RUSSIA - Tags: SPORT OLYMPICS)

A boy looks through the window as he travels in the funicular of Petare's Cabletren at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

Commuters travel in the funicular of Petare's Cabletren at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

The funicular of Petare's Cabletren is seen as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

The funicular of Petare's Cabletren is seen as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY TPX IMAGES OF THE DAY)

Commuters take pictures as they travel in the funicular of Petare's Cabletren at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

The funicular of Petare's Cabletren is seen as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

The funicular of Petare's Cabletren is seen as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: TRANSPORT SOCIETY)

The funicular of Petare's Cabletren is seen as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: SOCIETY TRANSPORT)

People walk next to the funicular of Petare's Cabletren as commuters travel in it at the slum district of Petare in Caracas August 21, 2013. The first stage of the Petare's Cabletren funicular will start operations over 2.1 km (1.3 miles) with three stops through the slum districts of Petare with a capacity of 3,900 passengers per hour. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: SOCIETY TRANSPORT)

Venezuela's President Nicolas Maduro (C) waves a rainbow flag as he speaks during the inauguration of a funicular at Petare slum in Caracas August 14, 2013. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)

Venezuela's President Nicolas Maduro speaks during the inauguration of a funicular at Petare slum in Caracas August 14, 2013. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)

Venezuela's President Nicolas Maduro speaks during the inauguration of a funicular at Petare slum in Caracas August 14, 2013. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)

Venezuela's President Nicolas Maduro (L) waves to supporters during the inauguration of a funicular at Petare slum in Caracas August 14, 2013. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)

Venezuela's President Nicolas Maduro (R) speaks to the media during the inauguration of a funicular at Petare slum in Caracas August 14, 2013. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)

Workers free the track of the Gurtenbahn funicular railway from fresh snow on the Gurten mountain near Bern December 8, 2012. REUTERS/Pascal Lauener (SWITZERLAND - Tags: ENVIRONMENT TRANSPORT)

A man is abseiled from a cable car during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY)

A rescue platform hangs beside a cable car as man is abseiled during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY)

A man is abseiled in a rescue bag from a cable car during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY CITYSPACE)

Fog covers the valleys behind as a man is abseiled from a cable car during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY TPX IMAGES OF THE DAY)

Fog covers the valleys behind as a man is abseiled from a cable car during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY CITYSPACE)

Fog covers the valleys behind as a man is abseiled from a cable car during an annual rescue exercise at the funicular to Mount Pilatus (2,128 m/6,982 ft) near Luzern November 9, 2011. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY CITYSPACE)

The village of Silvaplana is seen in the background as Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft), near the Swiss mountain resort of St. Moritz, January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft)from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: TRAVEL TPX IMAGES OF THE DAY) BEST QUALITY AVAILABLE

The village of Silvaplana is seen in the background as Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft), near the Swiss mountain resort of St. Moritz, January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft) from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: TRAVEL) BEST QUALITY AVAILABLE

The village of Silvaplana is seen in the background as Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft) from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL)

Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft)from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL IMAGES OF THE DAY)

Swiss acrobat Freddy Nock poses in front of the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down the cable over a distance of some 1,600 metres (5,249 ft) from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL CITYSCAPE)

The village of Silvaplana is seen in the background as Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft)near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft) from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL CITYSCAPE) FOR BEST QUALITY IMAGE: ALSO SEE GM1E8271SB301

Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft) from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL CITYSCAPE)

Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft)from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL CITYSCAPE)

The village of Silvaplana is seen in the background as Swiss acrobat Freddy Nock balances down on the cable of a funicular on the Mount Corvatsch (3,303 m/9,908 ft) near the Swiss mountain resort of St. Moritz January 29, 2011. Nock walked down over a distance of some 1,600 metres (5,249 ft)from the mountain station of the cable car in 3,303 metres (10,836 ft) altitude to the middle station (2,702 metres/8,865 ft altitude). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENTERTAINMENT TRAVEL CITYSCAPE IMAGES OF THE DAY) FOR BEST QUALITY IMAGE: ALSO SEE GM1E8271SHT01

A view of Russia's far eastern city of Vladivostok, from a cabin of a funicular train with festive decorative snowflakes on its windows December 29, 2010. REUTERS/Yuri Maltsev (RUSSIA - Tags: SOCIETY CITYSCAPE IMAGES OF THE DAY)

A man dressed as Father Frost (L), the equivalent of Santa Claus, and a woman dressed as Snow Maiden get presents out of a bag while a girl looks on in a cabin of a funicular railway, in Russia's far eastern city of Vladivostok December 29, 2010. REUTERS/Yuri Maltsev (RUSSIA - Tags: SOCIETY IMAGES OF THE DAY)

Rails of the Kitzsteinhorn cable car are pictured during a memorial ceremony for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)

Candles burn at a memorial for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)

Relatives and friends of victims attend a memorial ceremony for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)

Candles burn at a memorial for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)

Mourners attend a memorial ceremony for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)

A mourner attends a memorial ceremony for the tenth anniversary for the 155 victims of the Kaprun cable car disaster in Kaprun November 11, 2010. One hundred and fifty five people were killed ten years ago on November 11, 2000, when a funicular train packed with skiers was destroyed by a fire in a tunnel in the Austrian Alps. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: OBITUARY SOCIETY)