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

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

Built by the patriotic residents of Boonsboro in a single day.

This two-room factory has been cranking out the musical signifier of zaniness for a century.

Bizarre Cavern.

A monument marks the location of the first successful steamboat demonstration.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

All that remains of a gigantic earth-moving machine.

One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.

Home to several unusual artifacts, including a huge painting of George Washington.

Dozens of striking Indian symbols cover the second-floor hallways of this rural courthouse.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

An old church full of restored Catholic statues is a makeup artist's labor of love.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

Acres of English cottage gardens, unexpectedly nestled in a Cleveland suburb.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.