Lava tubes are large pipes and even cave-like structures that lead to underground lava rivers. They are remarkable formations of both active and dormant volcanoes and are must-see geological structures when you are on your Hawaii vacation. Thus the Hawaiian Islands forms a vital area for the study of lava tube caves in the world. It is in these tubes a good proportion of the voluminous lava of the islands is said to flow before they ever solidified. Some of top spots of the Hawaiian Islands where such lava tubes can be spotted are as follows:
The Hawaii Volcanoes National Park in the Big Island is a World Heritage Site, is a home to many lava tube caves. But to rough and remote terrain, much of the regional lava tubes remain under investigated. The most renowned among all is the Thurston Lava Tube. The tube is about 445 m long, with 120 m, electrically illuminated and noted for being the most visited lava tube cave of the world.
Wainapanapa State Park of Maui is the home to fantastic lava tube facing the ocean. It is a short tube and the entrance is through the black sand beach of Wainapanapa. East Maui’s Ka Eleku Cavern is renovated for ecotourism.
Hawaii Spouting Horn of Poipu in Kauai is an impressive ancient lava flow tube. There are also few sea caves and lava tubes near the Na Pali coastline.
Oahu Island is the home to lava tube caves known as the Halona Blowhole near the Hanauma Bay entrance. They are two million years old and the longest one is about 100 m.