There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Since 1920, one small company has defined the distinctive chairs of Paris' sidewalk bistros.

A treasure trove of fine art is hiding inside this small medieval abbey in Gascony.

A little known pile of scraps and plaques mark the grave of a downed RAF bomber.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

At this unique farm, you can interact with adorable donkeys and view an ancient dolmen.

A unique zoological park home to over 30 species of wild cats, both big and small.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

This crack in France's seaside cliffs once hid a sinister secret.

The shape of this old salt factory complex was inspired by the course of the Sun.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Abandoned outpost once home to a murderous tyrant.

This traditional festival celebrates a family of wooden giants that have survived Nazis, wars, and religion.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A small town hallucinates en masse - Bad bread, or CIA science project?

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

One of the world's most complex timepieces.

If they push on just the right spot, even the weakest person can move this titanic boulder.