Silfra Snorkeling Pond in Iceland is a unique and beautiful experience where visitors can swim between two tectonic plates in crystal-clear water. The water is chilly, but the stunning views and the opportunity to explore this one-of-a-kind location make it worth the discomfort. With tours available that provide all the necessary gear and even souvenir photos, Silfra Snorkeling Pond is a must-do activity for adventurous travelers visiting Iceland.