A tunnel drilled 30 metres into Langjökull, reached by an 8x8 truck, open every month of the year. Here is what it is actually like, what it costs, and why a natural blue ice cave might suit you better.
Into the Glacier is a tunnel that people dug into Langjökull, Iceland's second-largest ice cap. It opened in 2015. Roughly 500 metres of passages sit about 30 metres below the surface, at around 1,260 m elevation, and the entrance is a hole in a snowfield with nothing else around it for miles.
Because it is engineered rather than natural, it has things no real ice cave has: a level floor, handrails, LED lighting, an exhibition room and a small chapel that people actually get married in. The ice itself is genuine. You walk past compressed annual layers, dark ash bands from eruptions you can date, and a crevasse lit from behind so you can see how far down it runs.
The one reason to care: it is open every month of the year. Natural blue ice caves under Vatnajökull only exist from about November to March. This one does not melt shut in June.
This matters more than the photos suggest, so here it is straight.
Natural blue ice caves form when summer meltwater carves channels through a glacier and winter freezes them solid. Guides scout them fresh every autumn. They run November to March in the southeast, near Jökulsárlón and Skaftafell. They are cold, often wet, sometimes low enough that you duck or crawl, and the blue is real. No two seasons look the same, and some caves collapse.
The Langjökull tunnel is the opposite: identical every visit, wide, safe, dry underfoot and lit. A lot of the colour you see in tour photos comes from the lighting rather than the ice. You are seeing the inside of a glacier as a museum, not as a hole in the weather.
The Katla ice cave under Mýrdalsjökull, near Vík, also runs year-round, but its ice is streaked black and grey with volcanic ash. Different look, usually cheaper, and far closer to the South Coast.
Húsafell sits in Borgarfjörður, about 130 km from Reykjavík, roughly an hour and 45 minutes. Take the Ring Road north through the Hvalfjörður tunnel to Borgarnes, then turn inland on Route 50 and Route 518. Every metre of it is paved, so any rental car handles it in summer.
Winter is a different conversation. It is a valley road with real snow, drifting and black ice, and it does not get cleared on the same priority as Route 1. Check road.is (umferdin.is) the morning of, not the night before.
Two ways to do this.
If you have a car, drive. The extra money mostly buys a coach seat, and Borgarfjörður earns the rest of the day: Hraunfossar and Barnafoss are ten minutes from Húsafell, Deildartunguhver is the highest-flow hot spring in Europe, and Víðgelmir is a proper lava tube. That is a full day with no padding. It slots into a 7-day Ring Road itinerary as a Day 1 or Day 7 detour, since Borgarnes sits on Route 1 either way.
Prices move with season and operator. Treat those numbers as a bracket, not a quote.
From Húsafell you transfer into an 8x8, usually an ex-military truck with tyres taller than you are, run at low pressure so it floats on snow. It takes roughly 30 to 40 minutes to climb from the valley onto the ice cap, and the last stretch is on the glacier with nothing to look at but white. In poor visibility that part is genuinely disorienting.
At the tunnel you get spikes strapped over your boots and a helmet. The guided walk underground runs about 50 to 60 minutes. It holds around 0 to -2C, but there is no wind down there, so it feels warmer than the surface did. Wear layers and a waterproof shell, and wear real shoes; trainers get soaked in the slush at the entrance.
One practical thing: your lens fogs the second you step back out. Leave the camera in your bag for a few minutes.
July and August sell out weeks ahead, especially the Reykjavík departures. Winter runs a thinner schedule and gets cancelled more often. Not because of the tunnel, which is fine in any weather, but because the drive to Húsafell and the climb up stop being sensible.
Weather cancels tours in Iceland constantly and this one is no exception. Build a spare day into the trip instead of booking it the morning before a flight. Check vedur.is for wind and road.is for driving conditions, and take the yellow warnings seriously.
Compare departures and pickup options on our tours and activities page. Free cancellation up to 24 hours before is standard here and worth insisting on.
Skip it if:
Do it if you are travelling in summer and want to stand inside a glacier, if you are based around Reykjavík or Borgarfjörður, or if someone in the group cannot manage a glacier hike. The tunnel is flat and walkable, which makes it one of very few glacier experiences that works with limited mobility. Arrange that with the operator in advance.
Langjökull sits closer to the Golden Circle than the South Coast. Þingvellir is about an hour and a half from Húsafell, which makes Silfra snorkelling an easy next-day add if you can face two cold things in a row.
Snæfellsnes is the other neighbour: back down to Borgarnes and west, roughly two hours to Arnarstapi. If Reykjanes is erupting while you are in the country, volcano tours are worth watching, though access opens and closes with the activity and official closures are not negotiable.
For a night nearby, Húsafell, Reykholt and Borgarnes all work, and Borgarnes keeps you on Route 1 for the next morning. See where to stay.
Yes. It runs year-round, which is the main thing that separates it from natural blue ice caves under Vatnajökull, which only exist from roughly November to March. The Katla ice cave near Vík is the other year-round option.
No. It is a tunnel that was drilled into the glacier, with a level floor, handrails and LED lighting. The ice is real, the passage is not. Much of the blue in promotional photos comes from the lighting. A natural cave is rougher, colder and changes every winter.
You can drive to Húsafell in any car on paved roads. You cannot drive onto the glacier. The transfer up is by 8x8 truck and is included in the tour. The higher Klaki base camp meeting point needs a modified 4x4 in summer only, and a standard 2WD rental loses its insurance off paved roads.
Around 0 to -2C, but with no wind, so it feels milder than the glacier surface. Layers plus a waterproof shell are enough. Wear proper shoes rather than trainers, since the entrance area is usually slushy. Spikes and a helmet are provided.
About 3 to 4 hours if you join at Húsafell, of which roughly 50 to 60 minutes is underground. From Reykjavík with pickup, budget 10 to 11 hours door to door.
In summer, or if you are staying anywhere near Borgarfjörður, yes. Between November and March in the southeast, put the money into a natural blue ice cave instead. It costs less and looks better.