For decades, students around the world have memorized the same geography lesson: seven continents, split cleanly by oceans ...

You can sense it. There’s something supernatural at play as we snorkel the Silfra fissure between the North American and Eurasian tectonic plates in Iceland’s Thingvellir National Park.

Iceland’s Silfra fissure is one of the only places where you can dive between two continents. In some cases the space is so narrow, you can touch North America and Europe at once. Iceland’s ...