When this minimalist, L-shaped modern structure was first erected on the Massachusetts coastline, neighbors said it “looked like the ladies’ wing at Alcatraz,” according to the original resident, John Hagerty. Decades later, guests are still stopping by to explore this inspired Gropius/Breuer collaboration. Exposed pipes and steel staircases provide a streamlined look, while towering glass windows magnify the grandeur of the churning Atlantic Ocean below. Dwell spoke with the current owner, who said the compact-yet-open floor plan results in a “liberating” living experience.  Photo 4 of 12 in Design Icon: 10 Buildings by Marcel Breuer