A tribute to Ponce de Leon's supposed quest for eternal youth.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A haunted hill that supposedly defied gravity.

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

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

This failed condo development was reborn as a street art hub.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Continuing the tradition of the dime museum in style.

Remnants of a storybook amusement park hidden behind a strip mall.

The world's oldest continuously operating airport was founded by the Wright Brothers.

Two dozen pinball games hidden away inside a most unlikely location.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

A priceless collection of the Nation's cryptologic history.

The land is home to swimming ponies and a legendary 18th-century treasure.

An eerie, decaying ghost town destined to fade into the forest.

An astounding collection of medical specimens, including bits of President Lincoln.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A collection of artifacts from Maryland's maritime past.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.