Nahuku (Thurston Lava Tube)

Stop on Volcanoes National Park Hawaii, a free self-guided tour.

Nahuku, also known as the Thurston Lava Tube, is one of the most fascinating geological features in Hawaii. This natural wonder is a remnant of Kilauea's volcanic activity. The tube was named after Lorrin Thurston, a local newspaper publisher and an early promoter of the park, who discovered the tube in 1913. Nahuku means 'the protuberances' in Hawaiian, which poetically captures the otherworldly formations inside the tube.

The formation of Nahuku dates back about 500 years. It was created when lava from Kilauea's eruptions flowed down the slopes of the volcano. As the outer layers of the lava stream cooled and solidified, the molten lava continued to flow through the rigid crust, forming tunnels. Once the lava drained away, it left behind hollow tubes. Nahuku is an excellent example of this volcanic activity, complete with fascinating geological formations like stalactites and stalagmites made of solidified lava.

One interesting story about Nahuku involves its rediscovery. While local Hawaiians were undoubtedly familiar with the lava tube for centuries, Lorrin Thurston stumbled upon it much later. According to legend, he and a group of friends were exploring the dense, fern-covered rainforest when they noticed a mysterious opening in the ground. Armed with flashlights and a sense of adventure, they ventured inside and discovered the astonishing tunnel. The awe-inspiring natural beauty they found led to Nahuku becoming one of the focal points of Hawaii Volcanoes National Park.

Nahuku has a unique ecosystem. The entrance to the lava tube is framed by a lush, tropical rainforest. The rainforest itself is a stark contrast to the dark, cool interior of the tube. This microhabitat is home to ferns, mosses, and other plant species, providing a picturesque setting for visitors as they approach the entrance. Inside, although it may feel eerie, the tube is mostly devoid of animal life, offering an otherworldly quiet and stillness.

The tube is easily accessible to visitors. A short hike through the lush rainforest leads to the entrance. The trail is relatively easy and is suitable for most fitness levels. After a few minutes of walking, the entrance to the lava tube comes into view. The path is lit, but it's always a good idea to bring a flashlight to explore the darker areas of the tube. The tube itself is approximately 600 feet long and 20 feet high, allowing for an easy walk-through experience.

Amenities are well catered to. There are informational signs along the way that provide insight into the geological and cultural significance of the lava tube. Restrooms and picnic areas are available near the starting point of the hike. The national park also offers guided tours and ranger-led educational programs, which provide a deeper understanding of the natural history and significance of this incredible feature.

Visiting Nahuku is like stepping into another world. The tube's dark, cool interior provides a stark contrast to the vibrant, green rainforest outside. Whether you're a geology enthusiast or just looking for a unique adventure, exploring the Thurston Lava Tube offers an unforgettable glimpse into the volcanic forces that shaped the Hawaiian Islands. It's a must-see destination on the Big Island, providing both educational and awe-inspiring experiences for all who venture into its depths.