A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Secret North Korean passage discovered below the world's most dangerous border.

Hear the quietest sound from across the dome.

Now containing the bones of the actual conquistador, instead of someone else.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

An unexpected desert oasis in South America.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Famously misunderstood wonder of the ancient world

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

17th century mosque for Shah Abbas' harem.

The Uros people live on floating reed islands in lake Titicaca.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

The deepest metro station in the world.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.