It’s a mile long, self-guided lava tube. Around 42 ... as many as 120 steps on a rock carved staircase are a modest challenge ...

Lavacicles, a common feature, are squeezed out of a lava tube’s roof by gases under high pressure and then cooled mid-drip. The gooey appearance of a rock wall in Manu Nui cave was formed when ...

Jeju Volcanic Island and Lava Tubes together comprise three sites that make up 18,846 ... with its waterfalls, multi-shaped rock formations, and lake-filled crater. The site, of outstanding aesthetic ...

For a unique adventure along the Road to Hana, stop for a self-guided tour of the Hana Lava Tube, which can be found near mile marker 31. It takes no more than 40 minutes to explore about 1/3-mile ...