Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

This abandoned, partly demolished building is now home to beautiful graffiti and murals.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

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

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

This museum dedicated to divination also honors a local 10th-century prophetess.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

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

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

A little-visited waterfall in an otherworldly landscape.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A winding, blood-red tunnel of hardened lava navigable by foot.

An open-air sewer system that was covered piece-by-piece over 300 years.

A collection of weird and wonderful art fills a former houseplant nursery.

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

A Museum of Psychiatry in a still-operating mental institution.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

Inside this museum, Christians were imprisoned when the Romans controlled Gaul.