This Polish cave has housed a dragon, a brothel, and an enduring legend.

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

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

This building has survived for more than a century and remains virtually untouched.

A two-way chairlift system between Zugliget and the highest point in the city.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

A museum in the childhood house of a medical pioneer.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

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

Once the home of a hermetic monk, this cave now houses a small church.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

A massive, abstract lookout tower providing a panoramic view of Prague.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

A giant interactive periodic table with real samples of the elements.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

A bus with a butt and biceps to put Olympic athletes to shame.

An existential riddle in the world's largest ancient castle.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.