Okay, so technically the Xanadu Gallery could (should?) fall into the Shop category, but despite its standing as a place of business, it's the building itself that's the bigger draw. Located just steps from Union Square, this historic structure was originally known as the V. C. Morris Gift Shop and was designed by the great Frank Lloyd Wright in 1948. And while that fact alone would be enough to draw visitors in — along with the striking arch entranceway — it's the interior design and its spiral ramp theme that's most interesting, as it links this design with the far more famous Solomon R. Guggenheim Museum in NYC. And who knows — you might enjoy exploring the space so much you end up buying something.