What is the Thing?

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

An homage to everyone's favorite prehistoric cartoon family.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

When ecosystems collide in the arid Southwest.

The world-record holder for the longest bridge stretching continuously over water.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This huge clock made of flowers and simple machinery was once used a political weapon.

This stately clubhouse has showcased German-American culture for over a century.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

The only Florida state park with publicly accessible caves.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

A cannonball from Union forces battling John Hunt Morgan made this church a permanent home.

Over 200 people were buried here with only a small stone to mark their final resting place.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

Tucked away atop a quaint Alabama pharmacy is this tiny display of antique medical tools.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.