 Between 1927 and 1972 the Crystal Palace motor racing circuit was located in the park, supported by the Greater London Council, but the noise was unpopular with nearby residents and racing hours were soon regulated under a high court judgment.The Crystal Palace transmitting station was built on the former Aquarium site in the mid-1950s and still serves as one of London's main television transmission masts.In northern corner of the park is the Crystal Palace Bowl, a natural amphitheatre where largescale open-air summer concerts have been held since the 1960s.