Ahalanui Beach Park

Lonely Planet review

Ahalanui Beach Park is also called 'the hot pond' because of its main attraction - a large, spring-fed thermal pool set in lava rock that's deep enough for swimming. It makes for a pretty sweet bathtub: water temperatures average 90°F, cement borders make for easy access, tropical fish abound, and, though the ocean pounds the adjacent seawall, the pool remains mellow.

However, while ocean waters flush the pond, some warn of a risk of bacterial infection; don't enter if you have any cuts. While the park has official opening and closing times, the gates are never locked and nighttime soaks are possible. The park has picnic tables, portapotties and a lifeguard daily. Don't leave valuables in your car.