Smoky, also known as "Yorkie Doodle Dandy," was a four-pound hero of World War II.

This outdoor exhibit features a historic wooden dam once used to help boats navigate the Ohio River.

A small wall and marker are all that remain of this historic canal tunnel.

This campus museum commemorates a national tragedy.

A small town museum celebrates the history of the Ohio county that produced Annie Oakley and other famous figures.

The site of the worst mining disaster in Ohio's history.

One of the largest collections of holy relics in the country.

This NASA test station is home to some of the world’s largest and most powerful space environment simulation facilities.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

Solving a 60-year mystery finally gave a name to the young woman known only by the color of her clothes.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

An abandoned bait shop with a front lot filled with storage boxes.

Military and first responders can test their skills in a Foggy Bottom mock station down in Georgia.

A fascinating aviation museum where you can chat with the veterans who once flew the aircraft on display.

Interactive modern and vintage submarine equipment, World War II relics, and submarine attire.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

This abandoned mine and power plant was built atop land once given to Revolutionary War soldiers.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

This abandoned amusement park was built on a site with a dark history.

The only U.S. Senator to die on the field of battle is buried in San Francisco but memorialized at Balls Bluff Regional Park.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.