Climbing frightening heights allows them to experience completely new views of a city, like in this image of Nikolau posing on a construction crane of a skyscraper in Moscow.
They've scaled the cranes of Moscow's Mirax Plaza building, which rises over 40 floors. To capture this photo, Nikolau and the team climbed more than 780 feet above the crane, giving them the opportunity to witness a magnificent view of the sun setting over the city.
Part of the fun is discovering and exploring abandoned structures, like this radio tower in Russia. This perspective took a staggering 1,148-foot climb to reach, but was worth it for the lush scenery they saw below.
This extreme shot was taken from the top of the Red Gates Administrative Building, one of seven skyscrapers in Moscow that was designed in the Stalinist style. It rises about 400 feet into the sky.
The team has also been to the Ministry of Foreign Affairs building in Moscow, another Stalinist skyscraper. According to Semenov, this building was the most heavily guarded structure that they have been able to successfully ascend.
For some members, part of the thrill comes from getting around the security in buildings. This selfie was taken from a crane at the Mirax Plaza building in Moscow at a height of around 780 feet.
They also climbed up the cranes that were used to build Moscow's Evolution Tower, a skyscraper that rises in a spiral design.
In this photo, Nikolau can be seen laying at the edge of a roof from a height of 341 feet. In the background is a stunning shot of Moscow.