Get the ultimate Icelandic experience with this two-in-one tour that takes you beneath the surface. Visit one of Iceland's many lava fields and explore its nearby caves, then go snorkeling at one of the best snorkeling sites in the world - the recipe for a perfect full day tour. The tour starts with a pick up from your hotel in Reykjavik. From there, you’ll be taken directly to a lava tube cave close to the city. Depending on the season, you'll go to either the Leiðarendi Cave or Gjábakkahellir Cave - both are famous for their jagged rock formations and icicles that form over the winter. Here you will also learn how the volcanic activities have formed Iceland's landscape over the years. Once your cave exploration is done, you'll have the chance to grab some lunch before moving on to the second part of the tour. The second half of the tour starts with a relaxing drive to Thingvellir National park, a UNESCO World Heritage Site, where Silfra fissure is located. Follow the guide as he or she leads you through the beautiful crystal clear underwater wonderland, arguably one of the must dos when in Iceland. See Iceland from a different perspective with this tour perfect for adventurous nature lovers.