Not all eco museums are created alike, but the Ecomusée in Rennes, France is certainly worth its weight in green. The ecological museum not only greets you with interesting architecture on the outside, but with a charming and imaginative interior decor. Designed by Guinée Potin, a duo out of Nantes, the 9,400 sq ft museum was built out of ecologically sustainable timber and concrete. The three story museum serves to educate both children and adults on five centuries of history of the farm BinTin, one of the largest farms Rennes.