On May 15, 1935 the first line of the Moscow Metro, connecting Sokolniki to Park Kultury, was opened to the public

On May 15, 1935 the first line of the Moscow Metro, connecting Sokolniki to Park Kultury, was opened to the public. It was 11 kilometres long and included 13 stations. As of 2017, the Moscow Metro excluding the Moscow Central Circle has 206 stations and its route length is 339.1 km. Today, the Moscow Metro is one of the main tourist attractions of the Russian capital. Major transformations of the Moscow Metro throughout the years in this photo gallery by TASS.

More:
http://tass.com/society/754232