"This lovely state park stretches along the rugged volcanic shoreline of western Maui , three miles from Hana. It’s best explored on the 2.2-mile hike that starts at the black-sand beach and follows the dramatic coast, passing lava tubes, rock arches, blowholes, and Polynesia’s largest heiau (an ancient Hawaiian temple) along the way. Avoid standing too close to the geysers as well as the lava benches near the ocean, which can crumble easily, and watch out for high surf. If you’re looking to cool down after your trek, take the loop trail to the park’s freshwater caves, where you can explore two separate chambers (the first tends to be clearer and more inviting)."