Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

This erect, phallic geological spire wasn't always named so domestically.

A building so large that it has its own weather.

Town of spiritualists and mediums in Florida.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

These cinderblock farmhouses were actually World War II radar stations in disguise.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Noble beasts perhaps, but not the Emperor's dogs.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This massive redwood tree has a hole in the base big enough to drive through.

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

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

Former abode of notable poet, complete with literary references and stories of ghosts.

This elaborate towering structure was once famed for its revolutionary height.