Make your way to a designated pickup point in central Reykjavik, where you climb aboard a climate-controlled minibus for the journey to the Raufarhólshellir lava tunnel. Learn more about the geology of the area while getting fitted for your caving gear. Follow your guide to underground lava fields and climb through a lava tube. Marvel at layers of rock and lava deposits in one of the most active volcanic areas in the world.
After a lunch break (at your own expense), head to Thingvellir National Park, a UNESCO World Heritage Site. Listen to a quick introduction to the park and grab your snorkeling gear.
Continue to the Silfra fissure, which lies between the tectonic plates that separate North America and Eurasia. Put on snorkeling gear and a drysuit to explore the underground pool. Your guide takes you to the pool’s most scenic areas.
Finish the daylong adventure with a drop-off at the departure point.