The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

Thousands of well-dressed mummies below a monastery.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Seattle's own bad art museum located inside Cafe Racer.

This whimsical stacked cabin looks like something out of a children's book.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

The only wooden pagoda remaining in South Korea is part of a Buddhist temple that was established in the year 553.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This massive library holds what was once the largest book collection in the world.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The last bastion of Roman presence north of the Alps looms over a German town.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.