Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The world's longest known cave system.

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

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A mysterious castle built as a monument to lost love.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Become a prohibition rebel.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A Hawaiian stairway to heaven—that you can't climb.

A heavenly experience, right here on Terra Firma.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

An abandoned stretch of highway, deteriorating next to the operational one.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An underwater city for the dead.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

One person's lost luggage is another person's treasure.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A natural gas leak provides a flickering flame beneath a waterfall.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A castle that was built stone by stone by an eccentric journalist.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.