Tselinoyarsk (Russian: Целиноярск), also known as the Virgin Cliffs, was a region in the south of the former Soviet Union. The area was diverse in nature, its topography including swamps, forests, canyons, mountains, and was home to an incredible array of wildlife. Tselinoyarsk was the site of the OKB-754 and OKB-812 Design Bureaus headed by Nikolai Stepanovich Sokolov and Aleksandr Leonovitch Granin, respectively, as well as the military fortress of Groznyj Grad, led by GRU colonel Yevgeny Borisovitch Volgin. Nuclear testing was also conducted in the area.