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Location: Bremen, Germany
Architect: Rainer Mielke

Around 2,000 WWII-era bomb refuges still stand in Germany. Ranier Mielke began transforming them into homes 15 years ago, after passing one every day on his way to work every day sparked the idea. The thick walls of the bunkers (now featuring windows) ensure the homes are cool in the summer and warm in the winter, so in addition to being recycled properties, they’re energy efficient as well.

Photo: Mielke Freudenberg