The grave of a champion Thoroughbred hides within the former presidential estate.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

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

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

This taxidermy horse was a Civil War hero.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The rock on which Moll Dyer was found frozen to death is said to still bear her handprint.

Two dozen pinball games hidden away inside a most unlikely location.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

Just outside the Naval Academy, Hell Point is a historical marker that could easily be the point where failed students wait for the bus.

A Maryland museum dedicated to Black history, housed in a historic church.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

An eerie, decaying ghost town destined to fade into the forest.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

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

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

The 28,000-year-old specimen is remarkably intact.

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

The all-but-forgotten cemetery is Eastern Loudon County's largest African-American burial ground.

A cemetery and stairs are all that remains of this former church