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| Image Credit: Rene Frederick/Getty Images |
Adjacent to Lake Thingvalla, you'll find Silfra Crack. Filled with crystal-clear, glacial meltwater, this narrow slit plunges 66 feet (20 meters) into the Earth. It makes for a rather chilly descent, but sight-seeking divers make the pilgrimage each year to dive between the continents. Experienced cave divers can explore depths of more than 148 feet (45 meters) by swimming into the Silfra cave system.
Visitors frequently describe the Silfra diving experience as one of floating weightlessly through space. The glacial waters filter through miles of volcanic rock before emptying into the crack.
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