The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

This mummified mermaid corpse is an aquatic curio that was eventually revealed to be a fake.

The largest known medieval map of the world.

This memorial honors the first British soldier killed by enemy action on home soil during World War I.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

Ancient human remains unearthed around the iconic monument.

This poignant WWI memorial looks like a lighthouse 100 miles from the sea.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

Giant statue of a disembodied head.

A perfectly running 230-year-old silver automaton and music box.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

A museum devoted to the science of color.

The largest preserved walking dragline excavator in Western Europe.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A fascinating insight into daily life in the Eastern Bloc.

A museum dedicated to a Cold War era sausage.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

One of the largest mechanical models of the solar system in the world.

WWII artifacts, including the building itself.

This Victorian marvel of engineering and artistic prowess is nicknamed the "Cathedral of Steam."