Vatnajokull Glacier Caves, Iceland

Vatnajokull is Europe’s largest ice cap by volume, covering roughly 8,100 square kilometres of southeast Iceland and containing around ten per cent of the country’s landmass under ice up to 1,000 metres thick. The glacier’s outlet tongues extend down from the main ice cap to lower elevations; it is these outlet glaciers, particularly Breidamerkurjokull, that form the accessible ice caves.

The caves are formed when meltwater carves tunnels through the base of the glacier. Because of this formation process, they are genuinely seasonal: most caves only become stable and safe to enter from mid-October through March, when temperatures drop and the ice refreezes. Summer glacier caves exist but are significantly less dramatic and less structurally stable.

The Ice Caves

The caves accessible near Jokulsarlon glacial lagoon on the Ring Road (Route 1) are the most visited. The interior walls are blue-tinted translucent ice through which daylight filters; the blue colour results from the compression of the ice removing air bubbles over centuries. Some sections are coloured black or grey from volcanic ash layers deposited during eruptions, including the 2010 Eyjafjallajokull eruption. The ash striations serve as an accidental timeline in the ice.

Access is exclusively via guided tour from operators based in Jokulsarlon or the nearby town of Hofn. The tours are conducted in small groups (typically 8 to 12 people) with crampons provided. The walk from the parking area to the cave entrance takes 20 to 40 minutes across uneven glacial terrain. A standard three-hour tour costs approximately 18,000 to 22,000 ISK per person.

Jokulsarlon Glacial Lagoon

Immediately adjacent is Jokulsarlon lagoon, where icebergs calving from Breidamerkurjokull float slowly toward the sea. The lagoon has deepened significantly over recent decades as the glacier retreats; it is now about 300 metres deep. Amphibious boat tours operate in summer; in winter the focus shifts to the glacier caves.

Diamond Beach, where the ocean pushes ice blocks back onto the black sand, is on the seaward side of the road bridge. The contrast of clear and blue-white ice on dark volcanic sand produces the photographs you have probably seen.

Where to Stay

The nearest accommodation is at the farms and guesthouses along the Ring Road between Vik and Hofn. Glacier Lagoon guesthouses and Jokulsarlon hotel are the closest; most visitors come from Vik (about 150 kilometres west) or Hofn (about 80 kilometres east). Hofn is the practical base for ice cave tours, with several guesthouses and a hotel, and is known for its langoustine (smaller than lobster, sweet and best simply grilled; a portion costs around 3,000 to 5,000 ISK at Pakkhus restaurant in town).

Getting There

The Ring Road passes Jokulsarlon directly. Self-drive from Reykjavik takes five to six hours. Buses run along the Ring Road but with limited frequency; a hire car is the practical approach. The road is open year-round but winter driving in Iceland requires experience with ice and snow conditions.