The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A living antique aviation museum in the historic town of Red Hook, New York.

A decommissioned military complex that's now a modern industrial park.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

A peaceful international sculpture garden in upstate New York.

This mouldering abandoned mental hospital was once a center for progressive healing.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

The site of the first "historically true" UFO encounter in the U.S.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.