Run by its neighbour, the wax museum (Museu de Cera), this has to be one of the most unusual bars you'll ever see. As a bar it's nothing special (the prices are quite reasonable for the Ramblas). The fairy-tale decor is a little bit kitschy and a little bit delightful. The main room is an enchanted forest, another is an antique childrens' bedroom complete with a puppet theatre. Watch out for the fairies behind the mirrors.
There's also a shop, the Passatge del Temps, full of interesting trinkets in the museum-gift-shop manner.
Image by El Bosc de les Fades