The 28,000-year-old specimen is remarkably intact.

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

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Washington's iconic carousel has a nice piece of Civil Rights history.

It was once the base for a series of domestic terror attacks.

Holding the most bodies of any cemetery in the United States.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A geological mystery on Camelback Mountain.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

Historic Hull Street was actually the first street with a proper name in the Boston area.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

A bizarre roadside attraction and the first instance of miniature golf in the world.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

France's most famous cemetery, with some of its most curious tombs.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.