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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This demon atop the Notre-Dame de Paris looks utterly bored.

A wonderful collection of fossilized dinosaurs and other creatures that roamed the landscape millions of years ago.

A historic Christian shrine nestled within a spectacular natural cave.

These ungulates have quite literally bounced back from the brink of extinction.

An eerie collection of the surviving structures from a past celebration of the future.

Spain's largest bullring offers a unique glimpse at architecture and history.

The world's largest wooden structure.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

An unusual but excellent display created in the 1930s as propaganda against the Freemasons.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

A strange anthropomorphic stele with a mysterious inscription that has never been deciphered.

Fragments of human bones are embedded in the walls of this quaint alley.

A neighborhood park in the city of Cáceres hides what some believe are revolutionary examples of Neanderthal cave art.

The tallest tower in Cáceres's Old Town.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.