30 Once-in-a-Lifetime Adventures You Absolutely Need on Your Bucket List

25. Diving Between Continents in Silfra, Iceland

Where else in the world can you swim between two tectonic plates? The Silfra Fissure, located in Iceland’s Thingvellir National Park, is a crack between the North American and Eurasian continents, filled with some of the clearest water on the planet. With visibility extending up to 100 meters (328 feet), snorkeling or scuba diving here feels like floating through another dimension. The water, fed by glacial melt, is cold but pristine, making for an ethereal and unforgettable experience. Not a fan of cold water? Consider diving in the crystal-clear cenotes of Mexico’s Yucatán Peninsula, where underwater caves and ancient Mayan history collide.