Iceland – Þingvellir National Park

Snorkeling Silfra in Iceland is like entering another world. Even though snorkelling in winter is one of the last things you expect to do, you really shouldn’t pass up snorkeling Silfra, a fissure between two tectonic plates, with some of the clearest water and best visibility in the world.

Source: Silfra: Snorkeling Between Tectonic Plates in Iceland – Migrating Miss