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)

German model Lorena Rae arrives for the screening of the film “Tout s'est Bien Passe” (Everything Went Fine) at the 74th edition of the Cannes Film Festival in Cannes, southern France, on July 7, 2021. (Photo by Johanna Geron/Reuters)

Canadian singer Avril Lavigne leaves little to the imagination wearing a see-through top as she and boyfriend Mod Sun arrive at a friend's house in Calabasas, CA. with Avril's dog on July 14, 2021. (Photo by Backgrid USA)

English lingerie and catwalk model Abbey Clancy, the mum-of-four showed off her incredible toned tum on a modelling shoot in London, United Kingdom on November 8, 2021. (Photo by Backgrid USA)

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)

American actress, singer and model Zoe Kravitz is spotted out and about with a friend in New York City on October 6, 2020. The 31 year old “Batman” star carried a large tote bag and wore a blue tank top, black trousers, and matching flats. (Photo by TheImageDirect.com)

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)

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)