This is part of the Francke Foundation Museum, a curiosity cabinet filled with different scientific and natural wonders.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A massive ancient Chinese city with stone walls and evidence of human sacrifices.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

The resting place for anonymous victims of the Danube's dark waters.

The Habsburgs' royal collections of art and wonders.

The first museum in the world devoted to sexual gadgetry.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Walk through Czech history in Prague's largest graveyard.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

A spherical "micro-nation" in the heart of Vienna.

Dine amidst exotic plants at this former royal greenhouse.

Macabre museum devoted to historical Viennese murders.

The final resting place for the remains of 143 Habsburg royalty.

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

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.