Vulcanspeleological Features Above and Below the Big Island, Hawaii

The Big Island of Hawaii has some of the most fascinating vulcanspeleological features on any island or volcanic region on the planet. Lava tubes form when the low viscosity of lava flow develops a continuous channel and the surface hardens above the still-flowing lava. Some encased flows form different features and red oxidizing properties that give lava tube caves remarkable color and perspective.

On the Big Island, lava tube features provide timelines to ancient and recent flows — a future perspective on what lava might do in future eruptions. Hundreds of lava tube caves exist; Kaumana Cave is publicly open at almost 9,000 feet of passage. Bring a minimum of three lights, helmet, good shoes, and be prepared for sharp environments. Let's keep these beautiful caves free of graffiti so generations can enjoy them.