A rare example of World War I trenches from the British front.

A historic house left in "dramatic still life."

Stonehenge has nothing on Castlerigg’s views.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The famous winding walk at Chartres is surrounded in mystery and myth.

Historic medieval fortified city in southwest France.

French commune at the heart of conspiracies.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

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

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A moving memorial to the fallen and missing from WWI trenches.