Fodor's Expert Review Raufarhólshellir
At 1,360 meters, the Lava Tunnel is the fourth-longest lava cave discovered in Iceland. The cave is remarkably spacious—from 10 to 30 meters wide and up to 10 meters tall—making it quite easy and accessible for most people. Walking along the lava's 5,200-year-old path is a humbling experience in itself, and the views of the geological formations and spectacular colors are extraordinary. In winter, big crystal-like ice sculptures form inside the cave entrance. The standard Lava Tunnel tour takes about an hour.