Get ready for a truly unique Icelandic adventure, snorkeling in the Silfra fissure. You'll float effortlessly between the North American and Eurasian tectonic plates in some of the clearest water on Earth, with visibility over 100 meters. After a short 5-minute walk from the meeting point to the entry platform, your guide will help you into a drysuit, which keeps you surprisingly warm and buoyant in the chilly glacial water. It's a serene, otherworldly experience you won't soon forget.