Kaumana Caves Park
Thanks to Hilo's abundant rainfall, this lava tube is lush with plant life. Concrete stairs lead down to the 2½-mile-long tube, which has no lighted areas. The ground is uneven and damp, so wear sturdy shoes, bring a flashlight, and explore as far as you dare to go. There are restrooms and a covered picnic table at the cave, and parking across the street. Heed all warning signs when entering the caves.
