Waiʻanapanapa State Park
Swim in a cave, sun on a black-sand beach, explore ancient Hawaiian sites – this is one cool park. A sunny coastal trail and a seaside campground make it a tempting place to dig in for awhile. Honokalani Rd, which leads into Waiʻanapanapa State Park, is just after the 32-mile marker. The road ends overlooking the park’s centerpiece, the jet-black sands at Paʻiloa Bay.