This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

A hidden subterranean installation offers a view of the sky.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

100 massive sculptures in the Hudson River Valley.

20,000 pieces in a Frank Gehry-designed building.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The largest United States military cemetery overseas.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

America's most famous piece of self-built architecture.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."