Macabre astrological automaton clock dating to the late 1400s.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

One of the world's heaviest musical instruments towers within a popular urban park.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This viaduct serves as a reminder of World War II.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

This large open-air museum showcases the ordinary lives of the people of the Netherlands and pre-industrial crafts and practices.

Museum preserving torture methods from the past.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

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

This demon atop the Notre-Dame de Paris looks utterly bored.

What looks like a normal building is really a hollow facade hiding a subway vent.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

European castle ruins in an American state park are actually the product of death and grief.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

This contemporary art museum is filled with other, smaller museums, which feature work from artists primarily in the Pacific Northwest.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.