The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This pun was simply waiting to come to life, and one defense contractor made it so.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

A bit of retro transportation flair preserved in the world's largest department store.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Hear the quietest sound from across the dome.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

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

A modernist landscape of water and sci-fi concrete.

The hallucinogenic center of the ancient world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A beautiful geyser under environmental threat.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Famously misunderstood wonder of the ancient world

Northern Ireland's Brobdingnagian stepping stones.

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

Remnants of a storybook amusement park hidden behind a strip mall.