It is rare for a gallery to hold the notoriety of a museum, but the Gagosian manages to do just that. With 18 global locations, it is a truly unique destination where living legends such as Damien Hirst and Jeff Koons share space with those by historic icons such as Diane Arbus and Claude Monet. Stop by for a peek, stay for hours. 

Photo: Rob McKeever. Courtesy Gagosian.