Kaumana Cave

Kaumana Cave is a lava tube created by a 1881 lava flow from Mauna Loa. The tube has been surveyed at 2.026 miles (2197 m) long making it the 57th longest lava tube in the world.

The cave is located on the island of Hawaiʻi near the city of Hilo.

A collapsed skylight provides easy access to two of the tube's entrances which became a tourist attraction. Some parts of the tube are located under private property, and so are some of the entrances.