The Cascade complex in Yerevan, Armenia.

wikipedia: The Cascade (Armenian: Կասկադ Kaskad) is a giant stairway made of limestone in Yerevan, Armenia. It links the downtown Ketron area of Yerevan with the Monument neighborhood. Designed by architects Jim Torosyan, Aslan Mkhitaryan, and Sargis Gurzadyan the construction of the cascade started in 1971 and was partially completed in 1980. Inside the Cascade, underneath the exterior steps, are seven escalators that rise along the length of the complex. There are also exhibit halls connected to some of the landings along the escalators which compose the Cafesjian Museum of Art. The exterior of The Cascade features multiple levels adorned with fountains and modernist sculptures from the Cafesjian collection. The stairs afford walkers unobstructed views of central Yerevan and Mount Ararat. At the base of the Cascade is a garden court yard with statues by contemporary sculptures such as Botero. There are a number of cafes and restaurants on both sides of the Cascade frequented by locals and tourists. Classical and jazz concerts often take place at the Cascade during spring, summer and early autumn, with spectators sitting on the steps.