Whether you love him or loathe him, you have to admit that Gaudi was a master of creativity.
We've just spent a few days traipsing around Barcelona looking at his buildings and the city park and have been amazed by both his attention to detail (from doorknobs to frog gargoyles) and his approach to architecture.
That sounds a bit brochure-speak I know, but he really had a unique way of looking at things. This photo is of a chimney from the roof of an apartment building he designed. The building has no corners, virtually no walls (lots of windows and arches to let in natural light), an attic modelled on a snake skeleton and an undulating roof with these crazy chimneys and air vents.