Silfa Fissure Dive and Lava Tubes

  One of the coolest things I've ever done is snorkel the Silfra Fissure in Iceland. The Fissure is an underwater crack or opening between the North American and Eurasian tectonic plates. We booked our day trip through Dive Silfra. Our guide, Louis, picked us and four other travelers up at our hotel to drive us …