2. Tsvetnoy Boulevard Station (Grey Line). Opened on 31 December 1988, this postmodernist station was designed by architects Vladimir Filippov and Rimidalv Pogrebnoi. The station was built near the famous circus at the request of its director Yury Nikulin, who wanted children to have a more convenient way to get to the circus. Inside, the colourful stained-glass panel created by artist Vladimir Kalensky depicts three well-known clowns, but they are not easy to spot — it is a kind of puzzle.