Thurston Lava Tube (Nahuku)
One of the park's star attractions, Thurston Lava Tube (named "Nahuku" in Hawaiian) spans 600 feet underground. The massive cavelike tube, discovered in 1913, was formed by hot molten lava traveling through the channel. To reach the entrance of the tube, visitors descend a series of stairs surrounded by Hawaiian rain forest and the sounds of native birds. The Kilauea eruption of 2018 resulted in an almost two-year closure of the tube. During the closure, the drainage system was improved to reduce standing water on the cave’s floor, and electrical lines and lighting were replaced. Visitors should not touch the walls or delicate tree root systems that grow down through the ceiling. Parking is limited near the tube. If the lot is full, you can park at the Kilauea Iki Overlook parking lot, ½ mile away.
