In this photo taken on Friday, July 14, 2017, a student at a paramilitary camp for children calls the rank to attention outside Kiev, Ukraine. As the deadly conflict in eastern Ukraine entered its third year, some parents in Ukraine are anxious to make sure their children are ready to fight it, instead of swimming and playing volleyball. (Photo by Efrem Lukatsky/AP Photo)

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)

The Lumix GX1 single lens reflex (SLR) camera with 14-42 mm powerzoom lens is displayed at the Panasonic booth at the 2012 International Consumer Electronics Show at the Las Vegas Convention Center January 10, 2012 in Las Vegas, Nevada. The new camera comes with an external viewfinder and flash and an ISO up to 12,800. The camera as shown sells for USD 949; the camera body alone is USD 799. (Photo by Ethan Miller/Getty Images)

The Soyuz MS-17 spacecraft carrying the crew formed of Kathleen Rubins of NASA, Sergey Ryzhikov and Sergey Kud-Sverchkov of the Russian space agency Roscosmos blasts off to the International Space Station (ISS) from the launchpad at the Baikonur Cosmodrome, Kazakhstan on October 14, 2020. (Photo by Russian space agency Roscosmos/Handout via Reuters)

A visitor views “Giant Pumpkin, no1” by British artist Anthea Hamilton during the Frieze Art Fair in Regents Park in London on October 12, 2022. The fair is open to the public 14–18 October. (Photo by Guy Bell/Alamy Live News)

People view an installation over a lake that forms part of the Enchanted Forest Winter Illuminations at Stockeld Park in Wetherby, North Yorkshire on Monday, November 14, 2022. Light effects, a captivating soundscape, and animated installations come together in the ancient woodland once a year over the Christmas period. (Photo by Danny Lawson/PA Images via Getty Images)

A street merchant waits for customers in Niamey, Niger, Monday, August 14, 2023. Niger's mutinous soldiers say they will prosecute deposed President Mohamed Bazoum for “high treason” and undermining state security. (Photo by Sam Mednick/AP Photo)

A woman writes a get well message to former President Donald Trump during a prayer vigil hosted by Turning Point Action near the venue for the Republican National Convention (RNC), at Zeidler Union Square in Milwaukee, Wisconsin on July 14, 2024. (Photo by Andrew Kelly/Reuters)