Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Featuring the last fully walkable parapet walkway in Europe.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Beautiful antiques and obscure engineering artifacts trace the evolution of phones from rare luxuries to ubiquitous.

Electrical curiosity museum housed in an old transformer station.

A fake Transylvanian castle houses a cathedral of antlers.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Budapest's Communist-era statues, banished to the suburbs.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A museum of carnival attractions where you are invited to ride the rides.

A haunting collection of the vanished and disappearing natural world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Abandoned railway line circling the city of Paris.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

This grubby wall is said to be one of the Earth's esoteric energy centers.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

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

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

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

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.