Lava Caving & Snorkelling

Start the adventure with lava caving in a perfect example of lava tubes in either Leidarendi cave in the Blue Mountains (winter), or the lava field under Thingvellir National Park (summer). After a packed lunch, enjoy snorkelling in the crystal clear water of Silfra fissure, a rift between the North American and Eurasian plates, with world class visibility of around 80m.