Hike through a crystal-clear glacier cave

Deep inside Vatnajökull, Europe’s largest glacier outside the Arctic, the Crystal Ice Cave opens up anew every year. Flowing meltwater creates tunnels and cavities whose walls glow in intense shades of blue and turquoise. The centuries-old ice has been so strongly compressed by pressure that hardly any air bubbles remain trapped. As a result, it absorbs almost exclusively red light, while the blue spectrum shines through. The effect is a crystal-clear, luminous blue that constantly changes depending on how the light falls. Because the glacier is in motion, the cave looks different every year and can even form in a new location.

The guided tour starts at the car park at the Jökulsárlón glacier lagoon and lasts between two and four hours, depending on the option. Access to the cave is only possible from November to March, when conditions are stable enough. The hike takes place on glacier ice and requires the use of crampons and a helmet, which are provided by the guide. Tours are run in small groups and accompanied by experienced glacier guides, who choose the safest route depending on the weather and glacier movement. No prior experience is necessary, but a basic level of fitness is recommended as the hike can be physically demanding.