Whale watching has become hugely popular--and it's said to have been originated by the legendary John Olguin in San Pedro. The very best whale watching tours are arranged by Whalewatch with Cabrillo Marine Aquarium. On these tours,  naturalists lead two- to three-hour boat trips from a variety of landings. Group reservations at 310-548-7770, www.CabrilloMarineAquarium.org