The oldest continuously operating fish market in the United States.

Few other hotels can rival the grandeur of the Castle in the Rockies.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

This university transit system is a 1970s vision of the future.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

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

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Experience a charming 1930s version of "infotainment."

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

These markers are used to document elevation changes around the famed dam.

The world-record holder for the longest bridge stretching continuously over water.