Like the psychedelic Beatles' song, the unique Arctic Building, completed in 1917, is celebrated for its walruses. Their heads (25 of them), surrounded by intricate terracotta ornamentation, peek out from the building’s exterior.

Though the walruses’ tusks were originally authentic ivory, an earthquake in the 1940s managed to shake a few of them loose to the ground. To protect passersby from the unusual urban hazard of being skewered by falling tusks, the ivory was replaced with epoxy.