Video: Winter Cave Diving in Sweden

First discovered back in 1979, the Dolinsjö Cave is located underwater, making it extremely difficult to explore. But each year, a team of divers visits the cave during the winter, continuing to map out its depths in an attempt to determine just how large it actually is. So far, they've gone as deep as 1.7 km (1.05 miles), and have yet to locate the end of the cave. In this video, those divers take us along on one of their expeditions, giving us a look at the efforts they make in the name of exploration. It is a fascinating experience for sure, and I give these men a lot of respect for what they do. It can be very dangerous, and yet they press ahead into the unknown none the less.
Underground Movement: Cave Diving in Jämtland from Klättermusen on Vimeo.