Ancient human, animal, and geometric figures drawn in the earth.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

A prison tower–like edifice honoring a beloved local benefactor.

Mysterious chains and iron stakes adorn this strange grave, with no explanation.

World's largest working waterwheel has been around for over 150 years.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Concrete strongholds stand guard over the Golden Gate.

This monster board rode a monster wave to break two world records.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

An architectural oddity hides in plain sight on this iconic London bridge.

This fantastical and eclectic English garden takes its inspiration from Egypt, China, the occult and more.

This stream-carved gorge has inspired poets, hidden smugglers, and trained soldiers, all without losing its beauty.

A remarkable medieval structure born from a 14th-century disaster.

A petite castle folly in the English countryside.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

The last four extravagant street signs of London's historic banking street.