This mysterious and once-grand memorial still embodies a remarkable architectural vision.

The world's newest astronomical clock is also its most accurate.

Enormous sandstone towers loom within a Czech forest.

A perfectly preserved hill village where the buildings are painted like white lace.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

Naturally formed rock city in Poland.

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

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

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

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

The biggest exposition of dental equipement in Europe. And a Mummy.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

This renaissance château was home to an infamous witch hunter who sent a hundred suspected witches to their deaths.

Tiny communists hammer away on the Olomouc Astronomical Clock.

This almost a century old piece of architecture had been overlooked by most, except for the drunk and the homeless

A cheeky reminder about the value of art dangles above one of Olomouc's busiest streets.

Once home to artillery, this garden offers more peace today than it did during its war-torn past.

Austria's very first and only nuclear power station was completed but never used.

The mystery of the Putim Ossuary involves a tricorn hat.

A mesmerizing landscape of 18th-century cellars carved out of the land.

Heralded as one of the prettiest castles in all of Czechia.

Artfully arranged bones of 5,800 Austrians.

Mysterious painted skulls in Moravia.