People ride bikes near wild bluebells, which bloom around mid-April, turning the forest floor blue, forming a carpet in the Hallerbos, also known as the 'Blue Forest', near Halle, Belgium April 18, 2019. REUTERS/Yves Herman TPX IMAGES OF THE DAY 

Teacher of a local rehabilitation centre for children Ilya Shelko (R, front) and his assistant dip pupil Anna Orlova's feet into the cold waters of the Mana River during a regular recreation activity in the Siberian Taiga area near Mansky village in Krasnoyarsk Region, Russia March 24, 2019. REUTERS/Ilya Naymushin 

A group of tourists ride beach buggies in Wadi Billi, at El-Gouna near the Red Sea, Egypt November 14, 2018. Picture taken November 14, 2018. REUTERS/Mohamed Abd El Ghany 

Youths play soccer at Galle Dutch Fort, in Galle, Sri Lanka November 7, 2018. REUTERS/Dinuka Liyanawatte 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Fishing equipment is on display at Roessler fishing store in Vienna, Austria, October 29, 2018. REUTERS/Heinz-Peter Bader 

Athletes participe in Ironman 70.3 race in Cascais, Portugal September 30, 2018. REUTERS/Rafael Marchante 

A tattered basketball hoop outside a home is seen in the Penn Estates development where most of the homeowners are underwater on their mortgages in East Stroudsburg, Pennsylvania, U.S., June 20, 2018. Picture taken June 20, 2018. REUTERS/Mike Segar 

The world's oldest still-in-use basketball court, built in 1893, two years after the first court was created for the YMCA in Springfield, Massachusetts, is seen at the Union Chretienne des Jeunes Gens de Paris, the French equivalent of the YMCA, in Paris, France, August 1, 2018. Picture taken August 1, 2018. REUTERS/Benoit Tessier 

The world's oldest still-in-use basketball court, built in 1893, two years after the first court was created for the YMCA in Springfield, Massachusetts, is seen at the Union Chretienne des Jeunes Gens de Paris, the French equivalent of the YMCA, in Paris, France, August 1, 2018. Picture taken August 1, 2018. REUTERS/Benoit Tessier 

A soccer goal is pictured in Hafnarfjordur, Iceland, May 31, 2018. Picture taken May 31, 2018. REUTERS/Hannibal Hanschke TPX IMAGES OF THE DAY 

Swimmers enter the cold water during the first opening day at Wannsee lido, a public beach in Berlin, Germany, March 30, 2018. REUTERS/Fabrizio Bensch 

A teenager runs in a snow-covered park during an unexpected spring snowfall in Kiev, Ukraine March 29, 2018. REUTERS/Gleb Garanich 

Men throw a ball at the beach in Barcelona, Spain, March 28, 2018. REUTERS/Susana Vera 

A jogger makes his way past sprinklers alight with the morning sun on a beautiful autumn day in Washington, U.S., October 20, 2017. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY 

A picture shows general view of a chamber with an underground lake and boats inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov TPX IMAGES OF THE DAY 

People watch TV inside a halotherapy room at Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

People watch TV inside a halotherapy room at Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

People are pictured inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

People are pictured inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

A picture shows general view of a chamber with an underground lake and boats inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

People walk inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

A picture shows general view of a chamber inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

A picture shows general view of a chamber with an underground lake and boats inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

People are pictured inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

A picture shows general view of a chamber with an underground lake and boats inside Salina Turda salt mine, Romania, October 10, 2017. Closed for operation in 1932, the mine was opened to the public in 1992. In 2010 it was transformed into a themed park, offering different attractions such as boat tours in an underground lake, an amphitheatre, a carousel, as well as sports activities venues and recreation areas. Picture taken October 10, 2017. REUTERS/Stoyan Nenov 

A man jogs on the Corniche as high waves hit the waterfront in Marseille, France, September 19, 2017. REUTERS/Jean-Paul Pelissier 

A cyclist rides into a shaft of light between two buildings in Sydney's business district, Australia August 28, 2017. REUTERS/Steven Saphore 

People kite surfs in the Mediterranean sea at the southern city of Ashkelon, Israel, May 18, 2017. REUTERS/ Amir Cohen 

A woman plays paddle ball on the shore of the Mediterranean sea in the southern city of Ashkelon, Israel, May 18, 2017. REUTERS/ Amir Cohen 

A woman smokes marijuana during a rally against drug trafficking and in favor for the legalization of self-cultivation of marijuana for medicinal and recreational purposes in Santiago, Chile April 20, 2017. REUTERS/Ivan Alvarado 

A woman smokes marijuana during a rally against drug trafficking and in favor for the legalization of self-cultivation of marijuana for medicinal and recreational purposes in Santiago, Chile April 20, 2017. REUTERS/Ivan Alvarado 

A woman smokes marijuana during a rally against drug trafficking and in favour for the legalization of self-cultivation of marijuana for medicinal and recreational purposes in Santiago, Chile, April 20, 2017. REUTERS/Ivan Alvarado 

A man rides a bicycle on a rainy day in central Pyongyang, North Korea April 14, 2017. REUTERS/Damir Sagolj 

A man flies his kite from Salisbury Crags, in Holyrood Park at dusk, in Edinburgh, Scotland, Britain April 12, 2017. Picture taken April 12, 2017. REUTERS/Peter Cziborra

'Pinky Diamond' fires her revolver at a target during the Women of the West shooting competition at the Namoi Pistol Club in Gunnedah in rural New South Wales, Australia April 8, 2017. The annual event featuring women gun enthusiasts is in its fourth year and celebrates the gun-slinging traditions of the American wild-west using replica weapons, run by Australian Cathy Lysaght under her character name 'Kitty Pearl'. REUTERS/Jason Reed TPX IMAGES OF THE DAY 

Runners push a basket sledge as they descend towards Funchal, Portugal April 1, 2017. Picture taken April 1, 2017. REUTERS/Rafael Marchante 

Kite boarders and kite skiers compete during a regional snow kiting championship on the ice-covered Yenisei River in the Taiga area outside Krasnoyarsk, Russia, March 18, 2017. REUTERS/Ilya Naymushin TPX IMAGES OF THE DAY 

People enjoy an open-air hot bath in Bogacs, Hungary, March 12, 2017. REUTERS/Laszlo Balogh 

People enjoy an open-air hot bath in Bogacs, Hungary, March 12, 2017. REUTERS/Laszlo Balogh 

A couple enjoy an open-air hot bath in Bogacs, Hungary, March 12, 2017. REUTERS/Laszlo Balogh 

A football goal made with a brick and a dried coconut is seen as children play soccer in Corumbau village on the coast of Bahia state, Brazil February 19, 2017. Picture taken February 19, 2017. REUTERS/Nacho Doce 

A participant stretches on the beach before the start of an annual two-mile sea swimming competition in Colombo, Sri Lanka March 5, 2017. REUTERS/Dinuka Liyanawatte 

Participants swim during the annual two-mile sea swimming competition in Colombo, Sri Lanka March 5, 2017. REUTERS/Dinuka Liyanawatte 

A rainbow appears off the coast of Sydney's Wanda Beach in Australia, February 25, 2017 as the setting sun illuminates a passing rain shower. REUTERS/Jason Reed 

A man kitesurfs as people look at him in the Kalpitiya lagoon in Kalpitiya, Sri Lanka February 10, 2017. REUTERS/Dinuka Liyanawatte 

A man splashes the water while trying to find some seaweed in the Kalpitiya lagoon in Kalpitiya, Sri Lanka February 10, 2017. REUTERS/Dinuka Liyanawatte 

A woman skis in a park on the bank of the Moskva River in Moscow, Russia, February 2, 2017. REUTERS/Maxim Shemetov 

A paratrooper from the Sri Lankan military parachutes down during a rehearsal for Sri Lanka's 69th Independence day celebrations in Colombo, Sri Lanka February 2, 2017. REUTERS/Dinuka Liyanawatte 

A commuter cycles in central London, Britain January 19, 2017. The post Brexit vote slump in sterling makes it inevitable that bicycle prices will rise in 2017, the boss of Britain's UK's largest bike seller, Halfords , said on Thursday. REUTERS/Stefan Wermuth 

Alpine Skiing - FIS Alpine Skiing World Cup - Women's Downhill - Altenmarkt-Zauchensee, Austria - 14/01/17 - Tourists ski on a slope as the downhill course is seen during snowfall and fog causing the cancellation of the competition due to bad weather conditions. REUTERS/Dominic Ebenbichler 

A couple of elderly people skate in sub-zero temperatures at the City Park Ice Rink in Budapest, Hungary, January 6, 2017. REUTERS/Laszlo Balogh 

A couple of elderly people skate in sub-zero temperatures at the City Park Ice Rink in Budapest, Hungary, January 6, 2017. REUTERS/Laszlo Balogh 

People walk among snow-covered trees in Holzkirchen, Germany January 5, 2017. REUTERS/Michael Dalder 

People walk among snow-covered trees in Holzkirchen, Germany January 5, 2017. REUTERS/Michael Dalder 

People skate on the frozen Doubs river at the Swiss - French border in Les Brenets, Switzerland, January 2, 2017. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY