Aquarium of the Bay

Clear, acrylic underwater tunnels offer visitors a diver's-eye view of the Bay, while moving walkways take you through 300 feet of water, and past more than 30,000 aquatic creatures, including swirling schools of anchovies, spiny dogfish, and sevengill sharks. Upstairs, Touch the Bay offers a number of touch tidepools with leopard sharks, bat rays, and skates; Otters: Watershed Ambassadors features three playful North American river otters. If you've got time, combine your visit with the San Francisco Magic Show, an all-ages comedy and magic show at the Bay Theater, or an island hop or Bay cruise (Blue & Gold Fleet, 415-705-8200, blueandgoldfleet.com).