This modern monument to pagan belief looks like it was transported straight from ancient times.

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

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

The remains of a sunken military ship wreck visible through clear water.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

This Stockholm light tower can be controlled by anyone with a smartphone.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Six beautiful wooden giants are hidden around Copenhagen.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Menacing or in memoriam, the Silent People and their meaning are left to interpretation.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

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

One thousand trees were planted in Norway to be used to print books a century from now.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

A stunning silver lining to global warming's gloomy cloud.

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

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

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

Rippling sand dunes frozen in the Arizona rock.