Parc de Collserola, on the northern edge of the Barcelona metro area, bills itself as the largest metropark in the world. At just under 20,000 acres, it's 22 times larger than Central Park in N.Y.C. Half of the population of the province of Catalonia - about 4 to 5 million people - live within 10 kilometers of the park. The park is densely forested with thick underbrush. It's the watershed for the Llobregat and Besós rivers, so it's also full of many valleys and ravines. Because of this, there are many natural springs in the park, some of which are diverted into fountains. There are many small towns and private inholdings interspersed within the park and two of the highest points are home to a giant cathedral and a communications tower built for the 1992 Olympics. Near the Information Center is an old house that has been turned into a museum.
