Snorkelling Trips to Silfra in the National Park Thingvellir are operated by DIVE.IS. We conduct a variety of different Snorkeling Day Tours, such as the all time bestseller, the Snorkeling Silfra Day Tour or a number of Combo Tours where you can combine Snorkeling in Silfra with the Golden Circle or Caving in a lava tube or a visit to the Blue Lagoon or Horseback Riding or more…