The most amazing thing about the Ciudad de las Ciencias is the architecture. After passing the Palau Musica you get to the new opera house, which is yet to be opened to the public. Its futuristic design is amazing. It looks like something out of a sci-fi movie.

Then there is the Imax theater, the Science Museum, and the oceanography building, all of which are incredibly designed architecturally. I would say if you don't want to spend a lot of money, the building that is most worth visiting would be the oceanography building where they have a large aquarium and an Antarctica exhibit. Also, you must try the horchata stands... this is a drink that looks like milk, but is much sweeter and made from some kind of bean. Delicious!