Enjoy a half a day lava caving tour to leidarendi lava tube a 2000 year old lava tube located in the blue mountains in iceland this is a 4 5 hour tour where you get to experience the underworld of iceland hidden underneath a lava field the cave is 900 meters long narrow at some points so be ready to crawl a bit inside the cave a true icelandic adventure in a beautiful lava field expect to see different volcanic rock formations and colors we provide you with a torch light and a safety helm