One of the latest viral videos shows divers swimming between the North American and Eurasian continental plates.
The video, posted to Facebook by one of the divers, shows them swimming in Thingvellir Lake in Iceland, about 20 miles from Reykjavik.
Highlighted because of its significance as the point between the plates is the Silfa Fissure. Divers who swim there can put their hand on both of the plates at the same time.
The lake is known as one of the best diving sites in the world. The cold water in the lake is from a nearby glaciar ice cap that is filtered through porous underground lava for 30 to 100 years before reaching the lake, according to the Icelandic government.
“The Silfra water is as pristine as water can get and you can drink it at anytime during your dive or snorkel,” it says.
The video has been viewed nearly 25 million times in the past several days.