Antoni Gaudí’s weird synthesis of art and architecture is on full display on the superb rooftop terrace at Casa Milà. Here, chimneys take on the form of warriors in formation against a pure blue sky. The form and subtle textures make for endless photographic opportunities – this is just one of scores of photos taken on this afternoon.

Camera: Canon EOS Digital Rebel XT
Lens: Canon EF-S 70–300mm, focal length: 120mm
Exposure: ISO 100, 1/640 sec at ƒ/9.0