Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

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

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

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

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

A wunderkammer hidden on the top floor of the Hartford statehouse.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest self-built castle in the U.S., six decades in the making.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A psychedelic labyrinth on the San Francisco bay.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A huge musical instrument played by the ocean.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

The Ozarks' strangest dwelling.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

The only diamond mine in the world where you can keep what you find.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A self-built castle made by a mysterious man.