Concierge.com's insider take:
Monterey Bay supports one of the world's most diverse ecosystems and spans a whopping 5,300 square miles. A National Marine Sanctuary since 1992, it's an absolute must to explore by water, with frolicking sea lions and sea otters, low-flying pelicans, and giant orange starfish common sights.
If you've never gone kayaking, don't worry: It's fairly easy—assuming you're in reasonable shape and you stick to relatively sheltered areas (if you head out to sea, you're on your own). Monterey Bay Kayaks provides rentals, instruction, and tours for all levels; most tours last three hours and cost about $60 (800-649-5357; www.montereybaykayaks.com ) . If you want real drama, take a sunset paddle, or time your trip by the lunar cycles and take a full-moon tour.