Arkhangelsk Oblast the main shipyard for the Russian Navy. Among the oldest populated places of the oblast are Kholmogory, Kargopol, and Solvychegodsk; there are a number of Russian Orthodox monasteries, including the Antoniev Siysky Monastery and the World Heritage Site of the Solovetsky Islands in the White Sea. Plesetsk Cosmodrome is one of three spaceports in Russia (the other two are Kapustin Yar in Astrakhan Oblast and Yasny in Orenburg Oblast). Arkhangelsk Oblast, which includes Nenets Autonomous Okrug, borders Kirov Oblast, Vologda Oblast, the Republic of Karelia, the Komi Republic, and the White, Pechora, Barents and Kara seas. Cape Fligely in Franz
Astrakhan Oblast Okrug of Stalingrad Oblast. From October 8, 1980 to October 27, 1984, and under the leadership of Nikolai Baibakov, the USSR held fifteen deep underground nuclear tests for Nuclear Explosions for the National Economy at the site "Vega" in the Ryn Desert in the east of the oblast less than 50 km from downtown Astrakhan to create reservoirs for natural gas storage. Because of the detonation depth (975 to 1,100 meters) and relatively low yield (3.2 to 13.5 kilotons), no radiation was released to the environment. These blasts had lower yields than the Project "Sapphire" blasts, which were 40 km