The grounds of former plantations where abolitionist Harriet Tubman spent her youth enslaved are now a museum to her incredible life.

At 11,500 feet in elevation, there is no toilet in the state closer to the sky than this one.

Artifacts from a battleship sunk at Pearl Harbor displayed in the Capitol building of its namesake.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.

The final resting place of a baseball legend who was better known for his behavior off the field.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

Located near the U.S.-Mexico border, this park remembers the famous raid of General Francisco “Pancho” Villa and his soldiers.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

This statue of two men in a rowboat was erected to honor those who died while fishing in the Chesapeake Bay.

For nearly 50 years this airplane that crashed during World War II remained missing in the remote Australian backcountry.

A giant mascot, a car bomb, and the mafia mingle in the history of a defunct restaurant chain.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

The first steel dam in the world and the only one still functional in the United States.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

A memorial to the firefighters who died in an industrial disaster is housed in a small public park.

The remains of a boarding school designed to forcibly assimilate Native American children.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This small memorial is dedicated to the Perryville State Prison firefighters who perished fighting the Dude Fire in 1990.

A replica of the flagpole that gave a frontier town its name.

An empty mine that some believe will suddenly be filled with fortune and treasures at the end of the world.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.