Inside Iceland's crystal cave

But they were snapped inside a real-life lair of ice by an intrepid photographer who was forced to abseil inside Iceland’s Breidamerkurjokull glacier.

Nicolas Brousse’s effort was well worth it as he emerged from the popular tourist spot with breathtaking photos of an emerald blue world.

The 27-year-old Frenchman’s snaps reveal intricate patterns and stunning colours, including black layers of volcanic ash, that make the rippled ceiling look like crystal and the icy floor look like a pane of glass.

Nicolas' group went on the thrilling expedition with an experienced guide, and he used natural light as well as his camera’s flash to capture his incredible photos.

Breidamerkurjokull is an outlet glacier of Vatnajökull, or the Vatna Glacier, which is one of the largest ice caps in all of Europe. There are several volcanoes located under the ice cap.

Nicolas, who now lives in Malmo, Sweden, captured the images as he spent six months traversing Iceland and exploring its amazing scenery.

(dailymail.co.uk)