A submerged archeological park still holds the wonders of a Roman Sodom.

Fountain where visitors can earn a license to be mad.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Eclectic collection of dark and macabre antiques.

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

A fake Transylvanian castle houses a cathedral of antlers.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

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

Handsomely crafted representations of our round planet.

One of the best collections of wax anatomical models in the world.

The beautiful baroque library of the Hapsburg empire.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Ride a dragon train into a world of dwarves.