Skaftafell glacier: which tongue you actually stand on, and why the name is plural

Vatnajökull is a cap of ice sitting on the south-east of the country, and it does not end in a neat line. It sends tongues down through the gaps in the mountains, and where those tongues reach low ground people gave them names. Skaftafell is the green wedge where two of them come within sight of a car park, a visitor centre and a road. That is the whole reason this place became the address for walking on ice: the ice is close, and you can be standing on it within an hour of parking.

Falljökull is the one most trips name. It is the steeper of the two, it breaks into ridges and hollows as it comes down, and it is the tongue written into $159, which crosses it. A broken surface sounds like a drawback and is the opposite: the shapes are the reason to be there, and they are the reason a guide reads the route fresh each morning instead of following a path.

Svínafellsjökull is its neighbour. Same cap, different valley, a short drive from the same car park. Between them these two tongues carry almost everything sold as a Skaftafell glacier trip. Which one your listing uses is a decision the operator makes on conditions, and it is one of the few things on a listing page that can change between booking and arriving.

Breiðamerkurjökull is the same ice, an hour east. This is the tongue that reaches the lagoon at Jökulsárlón and calves the icebergs people photograph there. It is named in $172 and worked by $275. When somebody tells you the cave trips leave from the lagoon rather than the park, this is what they mean — not a different glacier, a different edge of the same one. Ten of the listings gathered here meet out there.

Mýrdalsjökull is not this glacier. It is worth being blunt, because the photographs get mixed up constantly. The Katla cave sold from Vík sits inside Mýrdalsjökull, roughly two hours west along the coast, and its ice is streaked black with volcanic ash. Five listings here go to it, $192 among them with 2,555 reviews, more than anything else on this site. It is a good trip. It is not the Skaftafell glacier, and the ash is the giveaway in any photograph.

The surface is not one thing. What the listings describe, in their own words, is crevasses, ridges, striking formations, blue canyons. What that means underfoot is hard, uneven ice with hollows in it, which is why crampons and a helmet are handed out before anybody steps on. In the cold half of the year the same movement that makes the ridges also opens tunnels and hollows underneath, and those are the natural blue caves. They are not permanent rooms; they are what the ice is doing this season.

The cheapest way on: $158. Four hours, meeting inside the park, a guided walk on the cap and a naturally formed blue cave when the season has one. It is the lowest fare of the twenty listings here. Its 4.6 comes from 21 reviews, so it is young rather than proven, and that is worth knowing rather than hiding.

The most proven way on: $160. 1,962 reviews at 4.5, and the listing describes itself as the closest meeting point to the ice, with guides, parking and hot drinks written into the price. If you want the version that the largest number of people have already done, this is it.

The most time under the ice: $195. Our top pick. A jeep run from the lagoon to a natural cave inside the cap, three hours, 4.6 from 962 reviews. You spend the day looking up at the Skaftafell glacier system from the inside rather than walking its surface.

The quietest ground: $310. Six hours, a 4x4 out onto the largest glacier in the country and a walk to a remote cave and its ice canyons. It holds the only 5.0 on this site, from 264 reviews, and its own listing says the point is to be away from the crowds.

The gentlest: $170. Three hours, rated 4.9 from 43 reviews, and the listing calls the walk itself easy. If the idea of a full morning on broken ice is what is holding you back, this is the listing that answers it.

Is the Skaftafell glacier the same as Vatnajökull? It is part of it. Vatnajökull is the cap; what you walk on at Skaftafell is one of its tongues. Anyone who tells you they walked on Vatnajökull and anyone who says they walked on Falljökull can both be describing the same morning.

Can you see it without booking anything? Yes. The park has viewpoints and valley trails that need no ticket, and from several of them the tongue is in plain sight. What a ticket buys is standing on the ice, which is a different proposition and needs crampons, a helmet and somebody who read the surface this morning. There is a page on this site about the views that need no ticket at all.

How close can you drive? Close enough that the walk in is part of the trip rather than the trip itself. The listings that meet inside the park run three and a half to four hours in total, and that figure includes getting to the edge of the ice and back.

Why do the ice caves at Skaftafell close in summer? Because they are not built structures. They are hollows and tunnels that meltwater and movement open in the tongue, and the warm half of the year takes them apart again. Roughly November to March is the window the operators work in, and the ones that sell a cave in July are selling the Katla cave in a different glacier.

Will the ice be blue? Sometimes, and nobody can promise it. Blue is what dense ice with the air pressed out of it does to light, and the same cave can read blue one week and grey the next depending on the snow above it and the light outside. The listings promise a naturally formed cave, not a colour, and that is the honest way round.

Is it changing? The tongues move and the shape of the front changes from year to year — that is what makes the crevasses, and it is why no listing describes a fixed route. Practically, it means a photograph taken two seasons ago is a picture of something that is no longer exactly there.

What do the reviews say? Across the 10,141 reviews on this ice cap, the same three things come back: the guides, the weather at the meeting point, and group size. The small-group listings — $169 with four generations of glacier work behind it, $173 from a small family firm — are where that last line shows up most.