The Haiku Stairs, or the Stairway to Heaven, is a semi-secret forbidden hike on the island of Oahu, Hawaii. The stairs were originally built in 1943 to install antenna cables as part of a larger military radio communication system to communicate with US Navy submarines as far away as Tokyo Bay. The original wooden steps were replaced by metal, cable-supported stairs in the early 1950s when the US Coast Guard took over the installation.
