The interior design of Sweden's giant nuclear bunker.In the mid seventies, when ABBA topped the music charts, Sweden was just putting the finishing touches on its giant civil defense nuclear bunker outside Stockholm, called the Elephant.Traditionally neutral Sweden made this a priority due to its close proximity with Russia, but the Elephant is unlike any other cold war bunker - because it looks rather like an underground IKEA.In order to prevent claustrophobia, fake horizons were painted on the walls of recreation areas, with green below and blue above, representing sky and grass. Even lamps were painted yellow to represent the sun. In the business parts of the bunker, such as briefing rooms and control rooms, shades of gray relieved by red were used.Unlike other bunkers which used the same tactics, with murals of mountain or countryside scenes the obsessive schematic nature of the Swedish bunker is like a children's bedroom in hell.Urban explorers have visited and documented the Elephant bunker. Here are our picks from a wonderful set by Bill_R on Flickr. Click through any of the pictures for more.