People in Seattle, Washington often call the 31-storey Rainier Tower the Beaver Building. You can see why: it clearly looks like a beaver chewed into the 11-storey pedestal on which the tower stands.
Minoru Yamasaki, a Japanese architect who also designed the Space Needle in Seattle and the former World Trade Center in New York City, developed this unique shape. His goal was to offer more space for pedestrian traffic and shopping at the base. Constuction finished in 1979.
-via Amusing Planet