Víðgelmir lava cave near Húsafell

Víðgelmir is the big lava tube of the West: a cave of about 148,000 cubic metres near Húsafell, by the operator's figure, fitted with a walkway and lighting so that a guided walk through it is easy going for most ages. It suits families, anyone combining it with the Langjökull ice tunnel from Húsafell, and a wet day in Borgarfjörður. It does not suit someone who wants a crawl-and-scramble cave; this one has been made comfortable on purpose.

The figures, read today: the operator's Cave Explorer tour lasts 1½ hours and is rated 1 of 5. Its own booking calendar showed 9,000 ISK for an adult (16+) on every November date; the youth (7–15) and child (0–6) fares appear only at checkout and were not read. Helmet and headlight are included; warm clothes, hat and gloves are recommended. Guests show up 10 to 15 minutes before departure at the service house at Fljótstunga. A shuttle from Húsafell Bistro is booked separately and leaves 30 minutes before the tour. Families with children under six follow the cave's guidelines, which can mean turning back before the last stop. The operator's Icelandic page gives the formations as about 1,100 years old.

#The arithmetic

The nearest sleep town on the ledgers is Borgarnes, on the seven-day and ten-day Ring Road. Borgarnes to the cave is 68 km and about 62 minutes each way by OSRM on OpenStreetMap. The tour is 90 minutes, early arrival 15, and a 30-minute buffer for a fixed departure: about 260 minutes. From Húsafell, after Into the Glacier, it is 12 km and 12 minutes each way, so about 145 minutes including the buffer. Neither Ring Road ledger visits Húsafell, so either figure is an addition to the route rather than a stop on it.

#What goes wrong

Cold: the operator says the temperature inside is low, so dress for it whatever the season. Winter roads: check road.is before driving road 518, and remember road 550 over Kaldidalur is closed from October to June. Late arrival: the guide waits for nobody past the briefing.

#Alternatives

Nearer Reykjavík, Raufarhólshellir is the year-round lava tunnel 40 minutes from town. On Snæfellsnes, Vatnshellir is the smaller, cheaper descent. On the way back to Borgarnes, Krauma is on road 50.

#Sources

The Cave's Cave Explorer page and Bókun booking calendar, its Icelandic tour page, and Into the Glacier's combination page, all read 1 November 2026; drives by OSRM on OpenStreetMap.