Flavorwire has a great post featuring famous artists' studios — I've chosen my faves here, and you can see the full post here.
(image sources, top to bottom: georgia o'keeffe studio, ouno design; willem de kooning's studio, automatism; alexander calder’s studio, mondoblogo; jackson pollock’s studio, the selvedge yard; paul cézanne’s studio, surface fragments; roy lichtenstein’s studio, daintyfaint; louise bourgeois’ studio, up like toast)