We know we're not the only ones with childhood dreams of hidden passageways, slides, and ladders. Here are 16 radical indoor spaces that fulfill those dreams and help burn off excess energy:
Above: A short slide in a girls' bedroom; photo via Milk Magazine.
Above: A white ladder functions as a climbing wall; photo via Mrs. Jones.
Above: A slide in an East Village penthouse designed by Turret Collaborative Architects.
Above: A loft space in Los Angeles, photographed by June and John Brown for OWI.
Above: A built-in slide in a house in Nakameguro, Japan, by Level Architects.
Above: An indoor steel slide in Skyhouse, a Manhattan penthouse designed by David Hotson. Photograph via Dezeen.
Above: A climbing wall in the upper rafters at David Hotson's Skyhouse in Lower Manhattan. Photograph via Dezeen.
Above: A concrete slide in Playhouse, a house near Jakarta designed by Indonesian architects Aboday.
Above: An interior climbing wall in Bergen, Norway, by Saunders Architecture via ArchDaily.
For rock climbers in the making, see 5 Favorites: Children's Climbing Walls for even more indoor and outdoor climbing walls.
N.B.: This post is an update; the original story ran on November 27, 2009.