A former customs station on the border of Germany and the Netherlands.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

Once home to a thriving oil industry, this town now sits eerily abandoned.

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

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

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

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

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

This park pays homage to the region's rich industrial history of brick making.

One of the few surviving examples of the first lock and dam system built on the Ohio River.