Warm they most definitely aren't -- but nevertheless, ice caves are some of the world's most enchanting and alluring places. However, from Iceland to Argentina, these incredible wonders of the natural world are rarely seen.
That's why we've gathered a stunning collection of images of ice caves here, for your viewing pleasure, like Einar Runar Sigurdsson standing in the Lightroom of the Crystal Ice Cave in Iceland above.
Water falls from the ceiling of the Crystal Ice Cave in an ethereal scene.
A River Runs Through It
Underground waterfalls mean underground rivers. Check out the running water in the Crystal Ice Cave.
Down Under the Drummond
Canada's Drummond Glacier is in Banff National Park in Alberta. It's 10 miles long and nearly two miles across, and flows west-northwest into Darbel Bay.
Ice stalactites hang from the ceiling with a backdrop of beautiful blue colors below the Vatnajökull Glacier in Iceland.
Time for a Cold Swim
The Vatnajökull ice caves also feature rivers and ponds. It's the largest and most voluminous glacier in Iceland, and covers more than eight percent of the entire country.
Several volcanoes rest beneath the Vatnajökull glacier in Iceland, and here's some bonus info: the glacier was used as the setting for the opening sequence (set in Siberia) of the 1985 James Bond film 'A View to a Kill,' Roger Moore's last film as Bond.
A slackliner at the lakeside of Lago Argentino in Argentina. Behind, you can see Perito Moreno, one of the world's unique glaciers.
Deep Down Under
Says photographer Juan Cruz Rabaglia: "This is the deeper hole of the cave under the Perito Moreno glacier. We coul hear a rushing river in the background."
South American Ice
Pro ice climber Cuny Proverbio explores an ice cave under the Petito Moreno glacier.
The Middle of Mont Blanc
Hidden in Mont Blanc's Mer de Glace is a stunning ice cave. But with the speed that the glacier is moving -- up to 300 feet a year! -- this cave may not be around forever.
Fire and Ice
Now this is a place to make coffee! Brewing up a pot in the waterfall ice cave in the Vatnajokull Glacier, Iceland.
'Moulins' offer access to ice caves through the glacier. They're formed where water enters the surface, and are usually vertical or near-vertical.
Explorers place ice screws as they cross a (cold) wall. Consequences of falling in? We don't know, but we're sure they're not good.
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