A hundred-year-old museum filled with giant physics toys and experiments designed by grad students.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

A theme park attraction designed to turn your children into LARPers.

For over a century, it was a crucial center of mental health treatment and also the source of many local legends.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

An office built to look like a giant basket.

See the nearly two-century-old ruins of pre-railroad America at the former site of a lock on the Ohio and Erie Canal.

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

Rare recess caves fill this unbelievably beautiful Ohio park.

The largest public collection of roses in the United States.

A small "palace" and museum made of, and devoted entirely, to salt.

Park filled with machinery that drove the southern agriculture and oil industries forward.

A mysterious drive-in nestled in the forest that leaves little to the imagination.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

A beautiful South Korean gate and garden in Little Rock honors American Taekwondo.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

An oasis of lilies cultivated by the "Indiana Jones of Water Lilies."

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

Once the smallest park in the national system.