There is a trench deep in the ocean off the coast of Iceland, where it is possible to dive down and touch North America and Europe at the same time by swimming between the two tectonic plates. It is the only place where you can dive between two continents. A crack between the two continents was formed due to the constant pulling on both tectonic plates. And as a result, the fissure provides us with many geological wonders.
Though the real fame of the Silfra Fissure is down to being a top spot for diving. Divers and snorkelers can literally float and swim between North America and Europe as if it was their swimming pool. Once you get into the narrow openings you can touch both sides at once.
Naturalists and biologists are in awe alike when studying the fissure, because the water is the cleanest in the world. The secret is down to the natural filtration process due to melting waters from the nearby Langjokull glacier filter going through underground lava before reaching the sea. It filters through the lava from 30 to 100 years before finally reaching the ocean. When underwater you can enjoy clear views that are breathtaking, easily watching all the underwater geography and life.
You can dive in the Big Crack, Silfra Hall, Silfra Cathedral or Silfra Lagoon. The last one is the favorite for snorkelers due to the vibrant and colorful algae. The Big Crack goes down 45m and also is home to the narrowest parts of the fissure where some points are only half a meter wide. Another favorite is, of course, the Silfra Hall which widens up into a huge underwater cave and the Silfra Cathedral has lava rock walls. In fact, every location is spectacular, which is why it has become one of the top diving spots worldwide.
Luckily for divers, they should be able to enjoy this spot for many years to come as the location is inside Thingvellir National Park. This is a park that is protected by regulations and requires anyone wishing to swim in the fissure to be accompanied by a registered local guide.