A decaying white cross lies in a small cemetery for children who died at Brandon Indian Residential School near one of three sites where researchers, partnered with the Sioux Valley Dakota Nation, located 104 potential graves in Brandon, Manitoba, Canada June 12, 2021. REUTERS/Shannon VanRaes

An archeologist using a torch inspects the world's oldest limestone cave painting, thought to be dated to at least 45,500 years ago, which is decaying at a rapid pace due to climate change, in Maros regency, South Sulawesi province, Indonesia, May 27, 2021. Picture taken May 27, 2021. REUTERS/Abdul Rahman Muchtar

Archeologists gather while inspecting the world's oldest limestone cave painting, thought to be dated to at least 45,500 years ago, which is decaying at a rapid pace due to climate change, in Maros regency, South Sulawesi province, Indonesia, May 27, 2021. Picture taken May 27, 2021. REUTERS/Abdul Rahman Muchtar

Decaying vegetables are left on a deserted market stand following the lockdown imposed to contain the coronavirus disease (COVID-19) in Manila, Philippines, April 24, 2020. REUTERS/Eloisa Lopez

A view of the Costa Sur power plant after an earthquake in Guayanilla, Puerto Rico January 10, 2020. REUTERS/Marco Bello

A view of a damaged section of the Costa Sur power plant after an earthquake in Guayanilla, Puerto Rico January 10, 2020. REUTERS/Marco Bello

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

Piles of rusted out, Soviet-era tanks and military equipment are seen at the "tank graveyard" in Asmara, Eritrea in this photo taken on February 21, 2016. Picture taken February 21, 2016. REUTERS/Thomas Mukoya

Piles of rusted Soviet-era tanks and military equipment are seen at the "tank graveyard" in Asmara, Eritrea in this photo taken on February 21, 2016. Picture taken February 21, 2016. REUTERS/Thomas Mukoya

People shake hands through the border fence between Ciudad Juarez and El Paso, during a binational mass in support of migrants and in memory of those who died trying to cross illegally into the U.S., in Ciudad Juarez, Mexico, November 3, 2018. REUTERS/Jose Luis Gonzalez

A tomb is seen during All Saints Day at Alto de Sao Joao cemetery in Lisbon, Portugal November 1, 2018. REUTERS/Rafael Marchante

Wheels from an old train carriage are seen in Harare, Zimbabwe, August 4, 2018. REUTERS/Siphiwe Sibeko SEARCH "SIBEKO TRAIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Damaged vehicles are seen near a tree after tsunami hit Lolik beach near Palu, Sulawesi island, Indonesia October 1, 2018. REUTERS/Beawiharta

Retro cars owned by retired mechanic Mikhail Krasinets are seen in the tall grass at an open-air museum of Soviet-era vehicles in the village of Chernousovo, Tula region, Russia August 28, 2018. Picture taken August 28, 2018. REUTERS/Maxim Shemetov

A view of Shatt al-Arab river from Al-Tanouma district, east of Basra, Iraq September 21, 2018. Basra residents say salt seeping into the water supply had made it undrinkable and sent hundreds of people to a hospital. Picture taken September 21, 2018. REUTERS/Essam al-Sudani

Traditional medicines cook at Khuong Vien traditional medical shop in Hanoi, Vietnam May 22, 2018. REUTERS/Kham

A private security guard blocks the camera to avoid being photographed at a new section of bollard wall in Santa Teresa, New Mexico, as seen from the Mexican side of the border in San Jeronimo, on the outskirts of Ciudad Juarez, Mexico April 23, 2018. REUTERS/Jose Luis Gonzalez

Firearms are seen after being turned in during a community gun buy-back program in White Plains, New York, U.S., April 13, 2018. REUTERS/Shannon Stapleton

Railway tracks are seen at a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Empty railway tracks are seen at a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Horns of a train locomotive which is parked at a so-called "train cemetery" are seen inside a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Railway tracks are seen at a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

A catenary is seen on a train locomotive parked at a so-called "train cemetery" inside a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Empty railway tracks are seen at a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Empty railway tracks are seen at a marshalling yard in Sotteville-Les-Rouen, near Rouen, France, April 12, 2018. REUTERS/Philippe Wojazer

Saudi man looks at the solar plant in Uyayna, north of Riyadh, Saudi Arabia April 10, 2018. Picture taken April 10, 2018. REUTERS/Faisal Al Nasser

A solar plant is seen in Uyayna, north of Riyadh, Saudi Arabia April 10, 2018. Picture taken April 10, 2018. REUTERS/Faisal Al Nasser

Steel rods are seen at a construction site in Phnom Penh, Cambodia March 30, 2018. REUTERS/Samrang Pring

Pieces of a truck are seen on the ground in a scrapyard in Port-au-Prince, Haiti, March 26, 2018. REUTERS/Andres Martinez Casares

A man carries a piece of metal in a scrapyard in Port-au-Prince, Haiti, March 26, 2018. REUTERS/Andres Martinez Casares

A man carries a piece of metal in a scrapyard in Port-au-Prince, Haiti, March 26, 2018. REUTERS/Andres Martinez Casares

A garbage bin with the words "STEEL MY JOB!" painted on it sits in a storage yard where structural steel is loaded onto a truck in the portlands of Hamilton, Ontario, Canada, March 9, 2018. REUTERS/Peter Power

A metal sculpture is seen on the premises of the Frere Hall, built in the British colonial period, in Karachi, Pakistan, January 30, 2018. REUTERS/Akhtar Soomro SEARCH "SOOMRO ARCHITECTURE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A frozen balustrade is pictured on top of the highest German mountain, the Zugspitze, in Garmisch-Partenkirchen, Germany February 28, 2018. REUTERS/Michaela Rehle

People walk near dredging equipment on a blustery day at St. Augustine Beach along the Atlantic Coast of Florida, U.S., January 26, 2018. Picture taken January 26, 2018. REUTERS/Gregg Newton

A flock of Pelicans fly above dredging equipment at St. Augustine Beach along the Atlantic Coast of Florida, U.S., January 26, 2018. Picture taken January 26, 2018. REUTERS/Gregg Newton

The chairs of an abandoned ski lift sit on a barren, ghostly mountainside in South Korea; like gravestones for what was one a vibrant holiday resort. As the country prepares to host the 2018 Winter Olympics in a raft of new sporting venues, the abandoned Alps Ski Resort, only around 100 kilometres (60 miles) away, stands in grim contrast, as the future of South Korea's new facilities remains uncertain. Located close to the border with North Korea, the resort had been used for skiing since the period of Japan's colonial rule in the early 20th century and was South Korea's oldest when it closed its doors in 2006. Its decline was caused by a drop in the number of people taking part in skiing, a phenomenon that has continued since the resort's closure. Whether local or national government will bear the cost of maintaining the 14 venues for the Pyeongchang Olympics after the games finish, is a matter of some debate. REUTERS/Kim Hong-Ji SEARCH "KOREA ALPS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: OLYMPICS-2018/LEGACY

Cars were burnt in the Thomas Fire during a winter rain storm in Ventura, California, U.S. January 9, 2018. REUTERS/Monica Almeida

Workers cut branches from the magnolia tree planted by President Andrew Jackson after it was determined the tree had become weak due to age and decay at the White House in Washington, U.S., December 27, 2017. REUTERS/Joshua Roberts

Workers cut branches from the magnolia tree planted by President Andrew Jackson after it was determined the tree had become weak due to age and decay at the White House in Washington, U.S., December 27, 2017. REUTERS/Joshua Roberts

Workers cut branches from the magnolia tree planted by President Andrew Jackson after it was determined the tree had become weak due to age and decay at the White House in Washington, U.S., December 27, 2017. REUTERS/Joshua Roberts

To an outsider, their passion is at times illegal and often on the verge of life and death. But climbing rooftops of high-rise buildings and exploring abandoned facilities is in the blood of these young Muscovites. The small group calls itself Rudex, which stands for "roof and decay exploration", and is akin a Western youth craze known as urbex or "urban exploration" of man-made structures. REUTERS/Maxim Shemetov SEARCH "SHEMETOV EXPLORERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: RUSSIA-ROOFTOPS/

A natural feature created by decaying vegetation and wind can be seen on a claypan in a drought-affected paddock on Kahmoo Station property, located on the outskirts of the southwestern Queensland town of Cunnamulla in outback Australia, August 10, 2017. Picture taken August 10, 2017. REUTERS/David Gray

A tractor door is seen in front of an abandoned house in the empty village of Repusnica, near the south-eastern town of Knjazevac, Serbia, August 15, 2016. REUTERS/Marko Djurica SEARCH "DEPOPULATION" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A pile of recyclable bullet casings used for the production of copper wires is seen at a foundry in Peshawar, Pakistan August 15, 2017. REUTERS/Fayaz Aziz TPX IMAGES OF THE DAY

Plants grow on the abandoned train at the workshop of Nepal Railways Corporation Ltd., in Janakpur, Nepal, June 4, 2017. REUTERS/Navesh Chitrakar SEARCH "CHITRAKAR RAILWAY" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.

A man stands on top of a damaged bike during a rescue mission at the site of a landslide in Bellana village in Kalutara, Sri Lanka May 26, 2017. REUTERS/Dinuka Liyanawatte TPX IMAGES OF THE DAY

A man stands on top of a damaged bike during a rescue mission at the site of a landslide in Bellana village in Kalutara, Sri Lanka May 26, 2017. REUTERS/Dinuka Liyanawatte

Rust is seen along the bank of the River Thames during low tide in London, Britain February 24, 2017. REUTERS/Stefan Wermuth SEARCH "THAMES WERMUTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A pair of shoes lie on railway tracks in Tenosique, Tabasco, Mexico, April 11, 2017. REUTERS/Carlos Jasso SEARCH "IMMIGRANTS JASSO" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Migrants walk during a snowfall inside a derelict customs warehouse in Belgrade, Serbia, January 11, 2017. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

A migrant stands outside a derelict customs warehouse in Belgrade, Serbia, December 22, 2016. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

Migrants stand in line to receive free food outside a derelict customs warehouse in Belgrade, Serbia December 21, 2016. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

Migrants stand in line to receive free food outside a derelict customs warehouse in Belgrade, Serbia December 21, 2016. REUTERS/Marko Djurica

Migrants stand in line to receive free food outside a derelict customs warehouse in Belgrade, Serbia December 21, 2016. REUTERS/Marko Djurica