One of the most spectacular canyons in the world.

Legend says this sacred tree was a gift from goddess Athena.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Built for a motel, this cartoon dino is now a symbol of the area's paleontological heritage.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

The notorious Wild West outlaw was raised in this unassuming abode.

Come for the speed, leave in love with the desert.

A house carved into a rock in the 1940s.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the most photographed locations in the entire city.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A tunnel with windows, so you don't miss out on the impressive views.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Quite simply the largest tree in the world (by volume).

See massive fossils that are over 200 million years old in northeastern Arizona.

A brutalist gem towering over the heart of Milan.

The secret medieval communication system will whisk your words above the noise of the crowd.

A floating cat sanctuary on an Amsterdam canal.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.