are no suitable caves in central Russia caving excursions are always in form of expeditions which usually last from three weeks to one month. In 2002 Demidov, Ljubimov and both Zverevs founded the Perovo-speleo team and the first cave where the team made a major contribution was Only Stones cave in August 2002, on Arabika massif, in the Dzou area. The cave, discovered by Italians, is close to a lake, at 2,000 m above sea level, and has a tall entrance. At the time it was 200 m deep and they managed to deepen it to 360 m. During an expedition in August 2004 they discovered Vjatskaja cave, in the same area. Only Stones ended with a large collapse while Vjatskaja continued, so they made several further expeditions into it, after several years it was 453 m deep. After 2001 Demidov and the team were also developing several caves on the Bzyb massif, adjacent to Arabika, such as Habju cave in 2001, Napra cave in 2001–2003, and Pantjuhinskaja cave in 2008. They also participated in expeditions to caves of other caving clubs, to Krubera-Voronja on Arabika in 2005, to Snežnaja cave on Bzyb in 2016. Verëvkina Cave When the team started to work in Verëvkina in 2000 it was 440 m deep with a narrow and long meander at the bottom. It was necessary to carry the excavated material very far. In November 2002 there was one more trip to the bottom: Demidov, Kostja, Petja, Grigorij Sanevič – Griša, also with Danila and Filip Čeredničenko from St. Petersburg. They decided to search for some other continuation on the way from the bottom to the entrance. At the depth of 120 m they discovered a narrow meander, where Demidov managed to pass through, to the top of a shaft. It continued. Every year until 2010 the team advanced, on 6 expeditions, following the draft in windows above the blind shaft bottoms. In 2010 they came to a meander at the depth of 320 to 340 m where they stopped and abandoned further exploration of the cave. In February 2007 Perovo-speleo started to continue the development of Moskovskaja cave. It is also situated in the Dzou area, it was explored in the eighties to a depth of 980 m; the entrance is at 2,307 m above sea level. Evgenij Starodubov, the only one left of the team who initially explored the cave,