The only Florida state park with publicly accessible caves.

This picturesque ghost town is located on the banks of the Suwannee River.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

A mysterious castle built as a monument to lost love.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

An underwater city for the dead.

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

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

Curious cave that stays a cool 56 degrees all year long.

European castle ruins in an American state park are actually the product of death and grief.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A ghost town that held steady longer than most, but finally gave up the ghost.

This ghost town was once a cult-like religious utopian settlement.

A Mars simulation in the southern Utah desert.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

Come for the speed, leave in love with the desert.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.