Traditional 11th-century outdoor tannery.

The other side is actually green.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

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

This replica Viking village was created for a film that was never shot and is now open to visitors.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

This fairytale-like structure is the last turf church ever constructed in Iceland.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

This beautiful, historic church looks like something out of a simpler past.

Three columns of volcanic rock shoot out of the ocean.

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

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This imposing 20th-century castle was abandoned before it was ever completed.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.