This fantastical waterfall is hidden in a cave located in a cracked cliff.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Staves, storm-calling, and of course, necropants.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Immortal combat in a Moscow museum.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

An intricately carved Viking church overlooks a glistening fjord.

Home to three historic ships from the age of Vikings.

Norway has built what may be the world's most beautiful public toilet.

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

The world's largest underwater restaurant is submerged off the southern tip of Norway.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's deepest subway station is also a stunning ecological wonder.