This lovely urban park on the outskirts of the old town is home to a massive, gorgeous fountain, a boating lake, and the Barcelona Zoo. If you've got a taste for politics, there is also the Catalan Parliamentary building. Everything is free except for the zoo, which costs 16.50 euro (24 US dollars) for adults, featuring everything from komodo dragons to gorillas. Need something to do the day after you've just skydived or climbed a mountain? Take a walk in the park!