Golf -- Nowhere else on earth can you tee off to whale spouts, putt under rainbows, and play around a live volcano. Hawaii has some of the world's top-rated golf courses. But be forewarned: Each course features hellish natural hazards, like razor-sharp lava, gusty trade winds, an occasional wild pig, and the tropical heat. And greens fees tend to be very expensive. Still, golfers flock here from around the world and love every minute of it. See the individual island chapters for coverage of the best resort courses worth splurging on (with details, where applicable, on money-saving twilight rates), as well as the best budget and municipal courses.

A few tips on golfing in Hawaii: There's generally wind -- 10 to 30 mph is not unusual between 10am and 2pm -- so you may have to play two to three clubs up or down to compensate. Bring extra balls: The rough is thick, water hazards are everywhere, and the wind wreaks havoc with your game. On the greens, your putt will always break toward the ocean. Hit deeper and more aggressively in the sand, because the type of sand used on most Hawaii courses is firmer and more compact than usual (lighter sand would blow away in the constant wind). And bring a camera -- you'll kick yourself if you don't capture those spectacular views.

Tennis -- Tennis is a popular sport in the islands. Each island section lists details on free municipal courts as well as the best deals on private courts. The etiquette at the free county courts is to play only 45 minutes if someone is waiting.