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

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A haunting collection of the vanished and disappearing natural world.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

A passage grave used in neolithic rituals.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

Two 2,500-year-old Phoenician boats found on the coast of Spain, giving incredible insight into the ancient maritime traders.

Remnants of the rich history of fish salting in this ancient Mediterranean port town.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.