DIAMOND HEAD CRATER
SUMMIT: 761 feet. TRAIL: 1.5 miles round-trip. Pack water, sunscreen, and a flashlight (dark tunnels!) for the trek up this Pacific landmark, an extinct volcano near Waikiki, Oahu. The rocky trail up the crater rim is steep at times, but kids as young as four can reach the summit observation deck. The reward is 360-degree views of surf, sand, and palms from Waikiki to Koko Head, a 642-foot promontory off the southeast coast of Oahu.
WHY KIDS LOVE IT
Mountaineering in the tropics is a great way to play Indiana Jones: The 225-foot tunnel is cool and spooky, and a surprise awaits at the trailhead, where hikers see that mighty Diamond Head Crater is a mostly hollow shell.
The Hilton Hawaiian Village Beach Resort and Spa (808-949-4321, www.hawaiianvillage.hilton.com) is situated in a prime spotit fronts the widest stretch of Waikiki Beachand has kids programs (for ages five to 12) for $50 per day, including lunch. Doubles start at $189.
Hawaii State Parks: 808-587-0300 www.state.hi.us/dlnr/dsp/oahu.html