This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Singing sand that stands as the final remains of an ancient lake.

A tree bears footwear on the loneliest road in America.

The longest navigable underground river in the United States is home to countless blind and albino animals.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

A forensic lab dedicated to fighting crimes against wildlife.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

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

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

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

A stockpile of childhood lunch pails turned collectibles.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

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

One person's lost luggage is another person's treasure.

This museum dedicated to an oft-overlooked support industry features a surprisingly moving brass diorama of a man being saved from a sinking car.

More than five miles of underground passageways.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The lynching and burial site of America's first train robbers.

Ornate limestone building now filled with geologic specimens, and more.

The first spinning jail built in the United States is the only one that still turns.

Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.