Photos: Saunders Architecture
You're looking at the Aurland Lookout in Norway - this amazing structure was designed by Todd Saunders and Tommie Wilhelmsen of Saunders Architecture, and is part of Norway's effort to get rid of stupid tourists by telling them it's a giant slide, ... er, promote tourism: Link - via svet koji se menja
So, how do they avoid people accidentally falling off the lookout? There's a glass fence: