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. Here: Urban explorer Vad Him of Rudex team jumps whilst on a rooftop in Moscow, Russia, August 14, 2017. (Photo by Maxim Shemetov/Reuters)

Lottie Moss attends JULIEN MACDONALD presenting Julien X Gabriela Spring/Summer 2020 fashion show during London Fashion Week at Southwark Cathedral on September 16, 2019 in London, England. (Photo by David M. Benett/Getty Images for Julien Macdonald)

American singer-songwriter and actress Mandy Moore arrives at the Walt Disney Television Emmy Party on September 22, 2019 in Los Angeles, California. (Photo by Mario Anzuoni/Reuters)

American singer Melissa Viviane Jefferson, known professionally as Lizzo performs at O2 Academy Brixton on November 06, 2019 in London, England. (Photo by Chiaki Nozu/WireImage)

A column of sand and front of clouds are seen by dash cam as the car drives near a tornado in Dragalina, Calarasi county, Romania April 30, 2019 in this still image taken from a video obtained from social media. (Photo by Alexandra Puscasu via Reuters)

In a photo taken on July 6, 2017 soldiers of the Korean People' s Army (KPA) watch a fireworks display as part of celebrations marking the July 4 launch of the Hwasong-14 intercontinental ballistic missile, in Pyongyang Fireworks lit up the sky over Pyongyang' s Juche Tower as North Korea celebrated its launch of intercontinental ballistic missile, a milestone in its decades- long weapons drive. On July 4 – the United States' Independence Day – it launched a Hwasong-14 rocket that analysts and overseas officials said had a range of up to 8,000 kilometres, which would put Alaska and Hawaii within reach. (Photo by Kim Won-Jin/AFP Photo)

Shakira and Jennifer Lopez perform onstage during the Pepsi Super Bowl LIV Halftime Show at Hard Rock Stadium on February 02, 2020 in Miami, Florida. (Photo by Mike Blake/Reuters)

Bangladeshi farmers busy to processing jute in Dhamrai outskirts of Dhaka on July 06, 2020. (Photo by Zabed Hasnain Chowdhury/ZUMA Wire/Rex Features/Shutterstock)