One of our very favorite rides at California Adventure is Soarin' Over California. It is such an amazing ride. On this trip, we were able to ride this three times! Going to Disneyland without kids meant that we were able to do a lot of rides as single riders... cutting our waiting in line time to almost nothing!
Wikipedia has this description of the ride: The simulator attraction takes 87 guests at a time on a simulated hang glider tour of the Golden State, flying over San Francisco, Redwood Creek, Napa Valley, Monterey, Lake Tahoe, Yosemite National Park, Palm Springs (actually shot in nearby La Quinta over the golf course at PGA West), Camarillo, Anza-Borrego Desert State Park, San Diego, Malibu and Los Angeles. The ride ends with a flight over Disneyland at Christmas, with a Christmas parade traveling down Main Street, U.S.A., decorations on Sleeping Beauty Castle, and fireworks.