A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

Norway's oldest cathedral still in use.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

An intricately carved Viking church overlooks a glistening fjord.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

An abandoned, deteriorating tuberculosis hospital from the turn of the 20th century.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

This declassified Cold War bunker hosts a large collection of Swedish aircraft.

The world's biggest floating museum in Gothenburg, Sweden.

The place to be if you love vintage Swedish cars.

This abandoned Antarctic base sits nearly unchanged since it was forsaken in the 1950s, just waiting for you to visit.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

Fire meets ice at the southernmost volcano on Earth.

Natural time capsule containing an alien ecosystem.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.