1. Banksy, Hammer Boy
Banksy famously loves New York City—in 2013, he staged a monthlong, citywide “show” called “Better Out Than In”—but most of his work here has been covered over, torn down to be sold or defaced by taggers. At least this modest stencil piece on the Upper West Side is still intact, thanks to the building owner, who installed a Plexiglas shield in an act of guerilla art preservation.
79th St between Broadway and Amsterdam Ave