40. C.W. Post College Dome Auditorium
Location: Brookville, NY
Year of Fail: 1978
Built in 1970, this 3,500 person theater collapsed in 1978 following a blizzard. While piled up snow and ice were the ultimate cause of collapse, faulty design made the shallow dome particularly vulnerable. Though compliant with all codes, the architect that designed the building only considered uniform roof loads, ignoring the fact that snow often drifts, causing certain spots to bear more weight than others. Luckily, no one was in the building when the roof caved and fell, saving the college and the architect from a whole lot of lawsuits.