Kazumura Cave

Kazumura Cave is a lava tube and has been surveyed at 40.7 miles long and 3,614 feet deep making it the longest and deepest lava tube in the world. The cave is located on the island of Hawaii on the eastern slope of Kilauea. Kilauea is the most recently active volcano on the Big Island. The Aila'au lava flow that contains Kazumura Cave originated from the Kilauea Iki Crater about 500 years ago.