Went to Valencia for the first time the other week, and checked out the City of Arts and Sciences.
Loved it. Spread across a massive area with lots of different angles to appreciate, with the pools also reflecting the buildings and the changing light throughout the day. And it really felt like being in a Space colony which was cool. Better then the Guggenheim for me.
Edit : Bugger it. Donīt know how to do pictures on this site