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

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

This ranch house in Jackson's Elraine neighborhood was home to the civil rights icons and the site of a shocking assassination.

This two-room shotgun shack in Tupelo is the birthplace of a King.

This simple, broken column marks the final resting place of one of America's most famous explorers.

This defunct, fortress-like prison has been the setting for several movies.

This church houses the “incorrupt” body of its founding Bishop.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

The alley connecting two of country music’s most historic venues has a rich history of its own.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This replica of the Greek structure is in the heart of Nashville.

This quirky local sculpture is quite literally a fish out of water.

This seasonal soft serve shack has been doling out silky swirls since 1951.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

This Connecticut ferry has been operating in some form since 1655.

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

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

A mysterious suspended hand greets unsuspecting visitors at the Tower of London.

The largest island on the great salt lake is home to curious creatures and strange stories.

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A gothic-styled structure that has been the location for several movies.

A converted hangar displays dozens of helicopters, from a famous 1943 rescue chopper to several autogyros.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.