This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A Cold War secret surveillance tower used to spy on radio communications.

An unusual bronze bus shelter is actually an art installation commenting on the city's history with the Nazi party.

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

Tiny communists hammer away on the Olomouc Astronomical Clock.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

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

Massive installation of Europe's negative stereotypes.

The rusted creatures wait to be discovered in Prague's botanical garden.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

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

Be(w)ar(e) the moat around this historic Czech castle.

A giant interactive periodic table with real samples of the elements.

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

A cheeky architectural easter egg.

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

The mystery of the Putim Ossuary involves a tricorn hat.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

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

A surreal statue honoring Prague's favorite literary son.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

A former squatter's paradise outside Prague.

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