The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Tiny communists hammer away on the Olomouc Astronomical Clock.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

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.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

A church of bones, decorated with 40,000 human skeletons.

An enormous and lavish Gothic church in Czechia.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

A floating cat sanctuary on an Amsterdam canal.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Cat art as far as the eye can see.

The world's only museum devoted to the wonders of fluorescence.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The attic of a four-century-old canal house hides a clandestine church.

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