This historical swimming pool near Miami is emptied and refilled each day with naturally filtered water.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

A unique collection of diving equipment spanning antiquity to the present day.

After a long career, a disastrous sinking, and a half-successful salvage, this Naval vessel-turned-artificial reef ended up exactly where she was supposed to—with a little help from nature.

An underwater statue of Christ blesses the coral reefs off Key Largo.

An underwater city for the dead.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

A mysterious castle built as a monument to lost love.

Where monkeys run wild and the humans are caged.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

A monument marks the beginning of the longest north-south road in the United States.

Final resting places of a husband and wife who became famous for their claims of extraterrestrial abduction.

This small museum is an eccentric shrine to boyhood in the 1960s.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

The shared home of a utopian commune that practiced "free love" a century before the hippies.

Taxidermy reptiles and rodents put on quite the show at this local history museum.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

A replica of the decorated wooden pillars Viking sailors threw overboard when finding new places to establish a settlement.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.