- Take your adventurous side to the next level by going deep down The Lava Tunnel to see its magical falls - Explore the depths of the cave and be welcomed by lava straws, jaw-dropping formations, and more - Have rare sightings of Iceland's famous northern lights from the big holes of the long cave if you visit at night - Capture stunning photos of the frozen falls and colorful lava formations you'll encounter inside The Lava Tunnel