Cameron Park Zoo. Adjacent to the Brazos River and nestled into 416-acre Cameron Park (where mountain-biking trails are bountiful), this award-winning 52-acre zoo displays creatures in their natural habitats. It features a state-of-the-art herpetarium (think snake house), lemur island, tortoises, birds, and lions in lush surroundings. 1701 N. 4th St., Austin, Texas, 76707. 254/750--8400; www.cameronparkzoo.com. $10. Mon.–Sat. 9–5, Sun. 11–50000.