Diver Claudia Schmitt explores a tectonic fissure in Iceland filled with ice-cold, crystal clear glacial water.

Iceland's Nesgjá fissure is a deep,150-meter long, watery crack through which crystal clear glacial water runs, at a freezing 2-4 degrees celsius.

Only discovered in 2009, Nesgjá is the larger sister of the famous Silfra fissure in southern Iceland.

Schmitt, the diver, told Newsflare: "It’s only visited by few divers and snorkelers every year, still quite unknown and almost completely untouched.

"Earthquakes created cracks that can be seen from the southwest of Iceland, all the way to the northeast. Some of these fissures are filled with water, usually glacial water that has been filtering through lava fields for many years, before it flows into rivers, the ocean, or these freshwater fissures."

Due to the activity of the Eurasian and North American continental plates, tension builds up in the earth’s crust. Earthquakes create cracks that can be seen from the south west of Iceland all the way to the north east.

Some of these fissures are filled with water, usually glacial water that has been filtering through lava fields for many years, before it flows into rivers, the ocean or these fresh water fissures.

Nesgjá is a 150 m long crack through which crystal clear glacial water runs - it is only around 2-4°C. Nesgjá has only been discovered in 2009 and in contrast to it's large sister Silfra in the South of Iceland, it’s only visited by few divers and snorkelers every year and still quite unknown and almost completely untouched.