A former copper mine which became a truly unsuccessful prison.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A monument celebrating the idea of reaching inaccessible places.

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

A man-made island in scenic San Francisco Bay.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Abandoned hotel with adjacent lake and golf course.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

This old mining town, deep in the California desert, has a year-round population of one.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

An architect's childhood fantasy treehouse made real.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

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

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.