Raufarhólshellir is an incredible lava tube located in Þrengslavegur, Iceland, and is the fourth-longest lava tube in the world at 1,360 meters (4,461 ft). It is incredibly spacious, between 10 and 30 meters wide (33 to 99 ft) and up to 10 meters tall (33 ft), making it accessible all throughout the year. Explore the hidden depths of Iceland by venturing into this underground paradise that features stunning rock formations that are as beautiful as they are fascinating. With a variety of tours available, visitors can go from novice to professional adventurers as they immerse themselves in the wonders that Raufarhólshellir has to offer. Get out there, and discover the magic that hides beneath the surface!