4. 33 Union Square West
Who: Andy Warhol
What: The Factory
Now: Puma Store

A few weeks ago, the shiny "Andy Monument" statue was erected in the northwest corner of Union Square to commemorate the life of Warhol and his famous Factory which was located not too far from where the statue stands. Presently, 33 Union Square West is a Puma store, but in 1968, a few floors upstairs, Warhol's Factory was in full effect. The infamous art studio/party spot is where he was almost fatally shot in the chest by Valerie Solanas.