Guggenheim / NYC
Rather than an exhibition within a museum providing a source of inspiration, it's the museum itself that does this in this case. The Guggenheim in New York has been a popular icon in modern architecture since its construction. I could regurgitate the history of this museum according to Wikipedia or some other infamous know-it-all but that isn't what caught my eye.
It's the rotunda that did.
I've never seen anything like it - having all the floors connected in one smooth direction. I found myself gliding through the exhibition, which is a novel feel because I'm use to dragging my feet. I spent hours in the museum happily; partly because the exhibition was amazing and partly because I was fascinated by the architectural design.