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

An underground city of salt.

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

This fortress was designed to prevent a Nazi invasion but was never used.

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

One of the oldest, well-preserved water treatment facilities in all of Europe.

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

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

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

An enormous and lavish Gothic church in Czechia.

The largest manmade caves in Europe now function as a motorbike club's headquarters.

The 14th-century ruins are said to contain healing powers.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

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

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A former squatter's paradise outside Prague.

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

The oldest garden in Prague, once part of an medieval orchard.

Enormous sandstone towers loom within a Czech forest.

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

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

Mummified monks and the accidentally interred, in a 17th-century crypt.