A memorial for an outsider theorist who believed that the planet is actually hollow.

This museum gives tribute to the underappreciated "Down-South Submarine."

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

A psychological self-portrait in the form of a giant, segmented head.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

One man's extraordinary topiary garden in a small South Carolina town.

The only free-standing, vertical sundial in the US was keeping standard time before it was even invented.

This natural spring not only claims to heal the wounded but it has also been willed to God.

Oldest and rarest examples of telecommunication in the world.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.

Settled in 1696, abandoned after the Revolutionary War.

A rapidly disappearing authentic bit of the old south.

More than five miles of underground passageways.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This replica of the Greek structure is in the heart of Nashville.

Where beautiful signs live on forever.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

An abandoned relic of the city's failed experiment with below ground transit.

A museum that houses the world's largest collection of ventriloquism dummies.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Moonbows over Kentucky.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.