An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

Step inside Lucy, the world's largest "elephant."

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

A headstone tells the sad story of a lost little boy and his pet dog.

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

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

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

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

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

A unique marker erected during the 18th century.

A diorama of the Civil War, fought by cats.

Home of the only civilian casualty at the Battle of Gettysburg.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

A piece of baseball history is preserved in a Pittsburgh parking lot.

Francis Julius LeMoyne built this crematory in 1876; he was the third person to be cremated here.

This outdoor exhibit features a historic wooden dam once used to help boats navigate the Ohio River.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

To find the "unicorns of the deep" you've got to go downstairs.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.