This ancient Spanish castle sits high upon a hilltop.

Abandoned medieval hill town.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A 300-ship graveyard, with a few still visible at low tide.

Venice's island of the dead.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A Romanesque tower appears when water levels drop.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Historic medieval fortified city in southwest France.

Eyam took steps to quarantine themselves and keep the plague from spreading.

6000-year-old site covered in more than 50 megaliths.

Seat of the Duke and Duchess of Devonshire for centuries.

Cemetery established by the Victorians as a solution to the overflowing graveyards.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Learn the history of Dominican rum production.

The first hospital in the New World.

The home, museum, and death site of Kodak's influential founder.

Famously misunderstood wonder of the ancient world

Europe's largest prehistoric mound – burial site of a legendary king?

A pyramid in Central Europe of unknown origin.

A hotly contested micro-nation off the coast of Montserrat.