Espace Dalí is a small museum in Montmartre dedicated to the works of Salvador Dalí. Dalí was mainly known for his surrealist paintings, but this museum has mostly drawings, sculptures, engravings, lithographs, and even a little room of surrealist furniture he designed; the furniture was actually my favorite part of the whole museum. If you're a fan of Dalí or weird art in general you will get a kick out of this place.
There really is no Métro stop that's anywhere near the Espace Dalí, as it's way up on the hill in Montmartre, tucked away around the corner from the Place du Tertre. However, you can work in this museum and the Place du Tertre as part of my winding stroll up to Sacré Coeur.
Be sure to check the museum's website for hours and tickets. This little museum is a bit expensive; about €11 last time I checked.
Related junk from Cool Stuff in Paris:
The Museum of Eroticism.Photo gallery of weird public art all over Paris Le Passe-Muraille
The Passer-Through-Walls; a neat sculpture in Montmartre.Musée Grevin
Creepy wax museum and more.Le Café de L'Enfer
A Hell-themed café in Pigalle.Giant thumb at La Défense