Rare recess caves fill this unbelievably beautiful Ohio park.

The mounds at this site were reconstructed with the help of archaeologists and historians.

The remains of a massive blast furnace in what was once one of the country's largest iron-producing regions.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A miniature world of concrete and stone in Springfield, Ohio.

The oldest county library in the United States.

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

Inside houses a vast collection of military aircraft and missiles spanning the ages.

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

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

A treasure trove of artifacts dating back to the late 19th century in Alabama.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Decades before the scandal, this staircase on the river was a literal "water gate."

An overlooked memorial honoring the local Washington residents who died in World War I.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

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

At 207 feet, one of the world's longest continuous escalators.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The remains of a chapel created for convenience.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

This kitschy tavern is also home to rare early editions of "Treasure Island."