Víðgelmir in Borgajford is the largest of all caves in Iceland, 148, 000 cubic metres, and one of the largest lava caves in the world. It has beautiful ice formations and deep inside there are lava stalactites and stalagmites. Bones and jewelry from the viking age are a part of the archeological remains found in the cave in 1993. It has been preserved since 1993 and entrance is only allowed with proper guidance. Guides from "The Cave" arrange short (1, 5 hour) and long (4 hours) tours. Please contact The Cave for information, availability and schedule. Víðgelmir lava cave is considered by specialists to be one of the most remarkable caves on earth.