Ruins of a German Castle on top of a towering stone pillar.

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

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

When the rain falls, this drain system turns into a musical instrument.

A surreal statue honoring Prague's favorite literary son.

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

Macabre astrological automaton clock dating to the late 1400s.

The site of Austria's biggest concentration camp now honors its victims.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

Baroque celebration of the end of the Great Plague of Vienna.

This strange statue features a bust of the famous composer plopped atop a woman's body.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

At least according to the Guinness World Records.

The fragmented remains of a massive public bath connected to the city's water supply.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This historic black and white monastery is one of Bulgaria's architectural jewels.

This building has two facades of clashing architectural designs.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

"Unity, Creativity, Beauty."