What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Less a museum than a bizarre fantasy world created by artists and engineers.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

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.

This turn of the century jail once held Charles Manson.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

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

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The palatial McDonald's that inspired Wesley Willis.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

These pretty kitties killed and ate as many as 135 railway workers.

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

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A science teacher's dream.

A lush green oasis in the middle of Chicago.

The world's second largest single-dish radio telescope, once used to contact E.T.

This tiny home was originally a narrow alleyway.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.