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

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

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

The largest ancient burial mound in Ohio.

The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

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.

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

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.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

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

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The first American department store, and home to the largest operating musical instrument in the world.

This elaborate towering structure was once famed for its revolutionary height.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.