What's cooler than a glacier? An underground lair inside a glacier.

From sleeping in a cave under the Grand Canyon to transforming abandoned subways into clubs and swimming pools, people all over the world are turning underground space into spectacular scenes. Because after all, in the most literal and hipster senses possible, everything underground is cooler.

Working off that notion, developers in Iceland have carved out what might be the coolest subterranean structure yet: An epic ice tunnel in one of the largest glaciers in Europe.

Let's dive in.

Located underneath Langjökull ice cap in the Highlands of Iceland, IceCave will be one of the world's biggest ice structures -- spanning an astonishing 656,984ft -- when it's scheduled for completion in May 2015.

Tour operators working in the area came up with the idea for the elaborate ice cave years ago, long before excavation work began this Spring. By the time the project's finished, the planners expect to have dug up around 75,347sqft of ice.

More than a mere underground passage, IceCave will be an all-in-one entertainment spot, featuring a network of caves and tunnels 98ft deep, with ample room for an exhibition space, ice sculptures, a restaurant, and even a chapel.

It's kinda like Las Vegas' CityCenter, but on a glacier, and less likely to be underwater (mortgage joke).

As trekkers venture deeper into the ice cap's cold heart, the ice will range on a spectrum of white to blue, signifying its age.

The cave's anticipated to have as many as 30,000 visitors per year -- all of whom will be provided with thermal clothing and non-slip footwear to keep them warm and alive.

Meanwhile, someone on the project's Facebook page has already inquired about how much it would cost to get married in the chapel. That's certainly a good way for the groom to get cold feet.

Until you can visit in person, enjoy a quick tour of IceCave with this video.

Chloe Pantazi is an editorial assistant on Thrillist's travel team. Yes, that's a British accent. No, she doesn't watch Doctor Who. Follow her on Twitter at @ChloePantazi.