We take you to the Ex. soviet submarine base. The base is under ground in a big cave and when it was in use the Subs. came under water and entered in to this secret cave /base. Now you can visit this and see what the west did not.

Balaclava Submarine Secret Base
Submarine Secret Base or "Object 825 GTS" - underground plant for submarines' repairing and exquipping started in 1957 and finished in 1961. Hollowed out in a rock and covered by 56m of reinforced concrete, submarine Base represented combined underground water channel with a dry dock, repairing workshops, torpedoes and other weapon stores. To enter the open sea there was an exit in the North side of the mountain. In a case of direct nuclear attack the object could resist a direct hit till 100 kilotons power - thick waterproof doors could be closed and the plant was able to exist autonomously for 3 years, consisting 3000 people - the whole population of Balaclava.
The total length of the tunnel is 500m, the length of gallery where the main workshops were located - 300m, the length of channel - 360m, the width 12 m and depth - not less 7 m. In the gallery 7 standard submarines could be located.