The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

Cat art as far as the eye can see.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

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

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

The most famous location in China was home to whole dynasties worth of imperial rulers.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The rogue roots are gradually consuming some of the historic marble grave markers.

At 207 feet, one of the world's longest continuous escalators.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

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

The celebrated eyesore created by starry-eyed sweethearts.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The curious underground history of keeping Paris clean.

The history of radiation is on safe display at the foot of a radiation science laboratory.