An Industrial Revolution-era public work that purified water using nothing but sand.

A nostalgic bibliographic gem.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A historic neighborhood church is reborn as a psychedelic arts collective.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The site of the climactic scene from the classic horror film is now a historic landmark.

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

This Indiana walk of fame honors music legends with record-shaped plaques in the pavement.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

Visitors to this Kentucky homestead turned museum are immediately transported back to the Antebellum south.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This tower-tomb honors a president who only held office for a little over a month but dedicated his life to his country.

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

The oldest brick house in the state of Ohio.

Inside this wonderland of weird, visitors are treated to a collection ranging from skeletons to haunted artifacts.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.