San Francisco’s condensed garden of incredible plant growth.

This turn of the century masterpiece has a mysterious goaty interloper.

The magic's in the hole!

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

The only rotating bar in New Orleans has been slowly spinning since 1949.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The drama of nature in full effect in this Nevada State Park.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Once damaged by Hurricane Agnes, this bridge is now on the National Register of Historic Places.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A hotel with a rich Wild West history of miners and bootleggers.

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

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.