Casa Batlló, Barcelona
Another Gaudi masterpiece, no straight lines, and the support pillars all look like human bones joined together. On the roof there are strange dragon-like creations, with the scales made of mosaic tiles. Casa Batlló was originally built as a house; it must have been a strange place to live.
By the way, the local name is Casa dels ossos; literally “House of Bones”. Here are some more photos.