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

Countless stories attempt to explain Poland's mysterious J-shaped trees.

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.

An underground city of salt.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

One of the most controversial statues in Romania is an emperor with no clothes.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

The growing stones of Romania.

Romania's triumphal arch looks out over Bucharest.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

Gigantic Romanian salt mines used to heal respiratory conditions.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This bone-filled cave got its name after they found 140 bear skeletons inside.

This snug medieval lane is one of the narrowest streets in the world.

Romania's only crater lake with water as pure as if distilled.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

Something's watching you.

A muddy alien landscape that is home to rare species of exotic plants.