Subterra Castle, Dover, Kansas
It doesn’t get much more green than living in a recycled home. This house is actually an underground missile silo in Kansas. After years of disuse, Ed Peden purchased the silo for a mere $48,000 and completely refurbished it to make it into a comfortable home for his family. The only indications that it’s even there are the turret-like escape hatches and a small shack at the entrance.