This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

A sculpture made from recycled materials and hand-blown glass dedicated to transportation and transformation.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

A historic presidential getaway on the continental United States' southernmost island.

The highway's southernmost spot is a beloved local attraction.

"We Seceded Where Others Failed."

A monument celebrating the idea of reaching inaccessible places.

Out of a desire to feed hungry soldiers, a franchise-altering idea was born.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Possibly the smallest church in the world floats in the middle of a pond.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

An interesting look into 18th-century American history.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.