This cave is actually a skylight in a 25-mile long lava tube that was created by an 1881 flow from Mauna Loa. Located near Hilo, the opening to the tube is overgrown with plants due to the abundant rain on this side of the island.
The opening is well-marked and a concrete staircase allows for easy entry to the cave. Bring a flashlight if you plan to explore the 2-mile long opening in the tube. Use caution when climbing the stairs as they may be slippery.
History reports that the 1881 flow stopped within 1 1/2 miles of Hilo due to the intervention of Princess Ruth. She camped in front of the flowing lava and prayed to Pele to spare the city. Her prayers were answered!