One of the world’s oldest surviving convict prisons, once the scene of daring escapes and riots.

Hamburgers are intensely proud of their tunnel beneath the river.

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

These tracks are believed to be from a panicked dinosaur stampede.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

In 1977, an eccentric book lover formed a micronation for book lovers.

Tucked away in a London Tube station, this 1920s linear clock shows the time across the world all at once.

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

This 86,000-square-foot artwork is the largest mural in the world to cover a dam.

The remains of Crystal Palace Great Exhibition of 1851.

One of the oldest suspension bridges in the world blends in perfectly with a medieval castle.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

This rural Australian restaurant claims to be the only restaurant in the world to be built almost entirely of sea shells.

This site pays tribute to the life of an iconic local dog.

This bronze memorial pays tribute to a local dog.

An unsuspecting brick building outside Orlando houses decades of train ephemera.

A unique rock formation that only a few have managed to venture inside.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

Light still pours into the ruins of this ancient Islamic observatory.