If you have the money to fly to Iran, and are into rock climbing then have I got a gymnasium for you! Based in Tehran, the architecture firm New Wave Architecture designed the gym located in Polur, Iran.
If your familiar with tectonic plates, you'll recognize the interior of this building. See what the architecture firm did here? It looks like the earth's crust! Brilliant!
The exterior of the building is designed to blend in with the surroundings, particularly when it is snowing out as pictured above. There are also routes for climbers on the outside, so you can repel in a winter wonderland. Fantastic!