Stone Cold Foxes

Concrete: Franco-Swiss architect Le Corbusier utilized the material to build the famous Notre Dame du Haut in Ronchamp, France. The historic Tower Bridge in London contains over 70,000 tons of it. And there's even a Tumblr that exclusively features those gray beauties. From a stackable bowl to a modular home in Ecuador, here are ten buildings and objects that are only getting stronger with age. View Slideshow

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