An incredibly well-preserved piece of ninth-century Viking poop.

This unusual geoglyph was built as a warning so low-flying aircraft wouldn't scare the zoo animals.

A clumsy-looking flying locomotive rusts within sight of a busy rail station.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

A measuring mishap led to these artificial stone ladies losing their stomachs.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This luxury shopping lane has been protected by its own tiny police force for over a century.

A chaotic collection of coin-operated slot machines designed to delight and disturb in equal measure.

Huge winged monument in the United Kingdom.

Iceland's tribute to its thankless civil servants.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

One of England's oldest stone churches and the birthplace of the "father of English history."

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The incredible private taxidermy collection of an eccentric zoologist.

Tiny memorials honor individual victims of the Holocaust.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Budapest's Communist-era statues, banished to the suburbs.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This tangled English forest looks like something right out of a fairytale.