Dover Street Market is the retail empire created by Rei Kawakubo, the woman behind Comme des Garçons.  It has outposts in New York, Tokyo, Beijing and London.  Its a multi-brand concept, with frequent collaborations and exclusive collections with its vendors such as Supreme, Bape, Common Projects and Prada.  It's one of the best places to shop in NYC, and frequently feels more like an art gallery than a retail store.

Check out their e-commerce site here.