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WATCH: Divers swim in crystal clear water between continental plates

It might not look like anything special, but this video of a diver swimming in a lake is anything but ordinary.

Hashem al-Ghaili posted a video to Facebook this week that has been viewed more than 24 million times. Why is it getting so much attention? The diver is swimming between the North American continental plate and the Eurasian plate.

A map illustrating the various tectonic plates. The boundary of the North American and Eurasian Plate can be seen running across Iceland.
A map illustrating the various tectonic plates. The boundary of the North American and Eurasian Plate can be seen running across Iceland. USGS

The divers are in Thingvellir Lake, Iceland, in the Silfra fissure between the two continents: they are drifting by two centimetres every year. It is a popular diving spot about 40 km northwest of Reykjavík.

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The water is crystal clear and is filled with hot springs, volcanoes and valleys which, according to Al-Ghaili, keeps the water a temperate -4 C year-round.