High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Seven Wonders of Russia as determined by a project organized by the newspaper Izvestia, Radio Mayak, and the television channel Russia. The competition took place in three stages from 1 October 2007 through 1 June 2008, with the final results declared in Moscow's Red Square on 12 June 2008. Lake Baikal (Russian: Ozero Baykal, is the world's second most voluminous lake, after the Caspian Sea. It is the most voluminous freshwater lake in the world with an average depth of 744.4 m (2,442 ft) and contains a total of roughly 20% of the world's surface fresh water.