Dive into an otherworldly experience as you float between the North American and Eurasian tectonic plates at Silfra. The water here is some of the clearest you'll ever see, filtered through volcanic rock for decades to offer incredible visibility. You'll be kitted out in a drysuit to keep you warm and comfortable in the near-freezing glacial water, making this a surprisingly serene and accessible adventure. It's a truly unique way to witness the raw, geological beauty of Iceland, located right in the heart of Þingvellir National Park.