Raufarhólshellir
The Raufarhólshellir lava cave is located north of the port town of Þorlákshöfn, almost on the south coast of Iceland . It is over 1300 m long and is partly under the Þrengslavegur , the shortest route between Reykjavík and the port.
Web links
Coordinates: 63 ° 56 '23 " N , 21 ° 24' 3" W.