Three hundred years of preserved Spanish colonial history in San Antonio.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A clear blue swimming hole with hidden caves, still unexplored.

A museum dedicated to the alleged Roswell Incident.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

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

The key to turning shifting dunes into the green oasis of Golden Gate Park.

This private residence was the template for one of the most beloved television homes of all time.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco's first World's Fair, dedicated to the wonders of California.

The legendary statue-hating superintendent of Golden Gate Park is honored with... a statue.

This giant temperature attraction created some giant electric bills.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

The world’s largest concentrated solar plant generates as many problems as megawatts.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This one has sailed five times as far as Sir Francis Drake's famous ship.