The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

A small Richmond island dotted with the remnants of hundreds of years of history.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

America's post-nuclear-attack chambers of Congress.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

An elegant sandstone stairway built by the WPA still connects two neighborhoods in Akron.

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

For decades, this waterfall remained hidden because of an artificial dam.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

The only presidential monument to display a late POTUS's actual casket.

A real flying saucer, contracted by the U.S. Air Force.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

This magnificent Cincinnati graveyard is also a popular public park.

What is it about mushrooms that makes people wish they lived inside of them?

Rare recess caves fill this unbelievably beautiful Ohio park.

The angel of death appears to weep black tears at this grave marker.

Where beautiful signs live on forever.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

The empty tomb that houses the memories of Roy Bertelli's revenge.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.