Home to the most complete dodo remains known - one head, and one foot.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

Black cat statues guard this temple-like Egyptian revival factory.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

This small collection of rare books was uniquely locked up for safe keeping.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

Human-made caves excavated to hide a secret society of wealthy pagans.

One of Europe's oldest libraries.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Cliffs full of fossils at the portal to England's Jurassic Coast.

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

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.