Puerto Rico's only zoo is just north of downtown. Its 45-foot-tall aviary lets you walk through a rain-forest environment as tropical birds fly overhead. There's also a butterfly park where you can let brilliant blue morphos land on you, and an arthropodarium where you can get up close and personal with spiders and their kin. Video monitors in the floor show the bugs that normally get trampled underfoot. The older section of the 45-acre park has undergone an extensive renovation, with most cages replaced by fairly natural-looking environments. A popular resident is Mundi, a female elephant who arrived as a baby more than two decades ago. There are also plenty of lions, tigers, and even bears.