This early pioneer landmark is one of the oldest buildings in this part of Kansas and one of the few Dutch mills ever built in the state.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Press 1 for knock-knock jokes.

Where you can hail your favorite fictional commanders-in-chief.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

The most accurate timepiece in the world.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The national park was once a plantation estate.

There’s a hidden military meme engraved on the World War II Memorial.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This restaurant is devoted to celebrating Appalachia's cuisine.

The last remaining location of a drive-up hot dog stand named after a local pool shark.

Dedicated to a veritable Houdini among P.O.W.s who escaped imprisonment on five separate occasions.

Designated as an Underground Railroad research site.

Mass grave of 50 unidentified French Soldiers who died at the Siege of Yorktown, 1781, that gave victory to the American Revolution.

The final home of the most famous horse of the American Civil War.

In an effort to escape the horrors of slavery, one man mailed himself to freedom.