Europe's second largest ossuary wasn't discovered until 2001.

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

Massive installation of Europe's negative stereotypes.

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

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

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

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

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A series of playful yellow penguins share a serious message about the environment.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

An existential riddle in the world's largest ancient castle.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

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

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

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

This doorless 20th-century elevator doesn't stop or slow down.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Macabre astrological automaton clock dating to the late 1400s.

Living trees form the structure of an open-air palace.

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

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