Outdoor, Trees, Grass, Back Yard, Concrete Patio, Porch, Deck, and Small Patio, Porch, Deck The 1968 house’s shape—a rounded triangle topped with a sweeping concrete roofline that suggests a helmet as it rises above huge banks of windows—lends itself totally to Kukkapuro’s philosophy. “It is a structure in waiting, prone to change as the landscape around it—not yet a form, rather a possibility,” he says. “It changes in harmony with the seasons and the moods of its inhabitants.”  Photo 2 of 11 in 10 Works of Architecture That Reveal the Acrobatic Wonders of Concrete from The Modern Studio of a Finnish Design Legend

10 Works of Architecture That Reveal the Acrobatic Wonders of Concrete

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A 1968 house by Finnish architect Yrjö Kukkapuro embodies the optimism of the postwar period with its sweeping, leaf-inspired concrete roof that appears to float over the glass house below.