A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

It leads to a former hospital’s old root cellar.

This enchanting forest trail leads to ethereal abodes and a giant bird's nest.

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

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

A natural history museum with an extensive collection of bird dioramas.

A cemetery for only coon hounds in northwest Alabama.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

This botanical garden has been nicknamed "Alabama's Little Corner of Greece."

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Colloquially known as "the lynching memorial," this is the United States' first memorial to the victims of racial terror at home.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

148 feet long and in the middle of a verdant forest.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

A unique book shop with a collection of rare tomes and a nostalgia museum.

This fountain was commissioned by a mother grieving over her son's passing.

This little-known memorial honors those who have donated their bodies to medical training.

The metal spire on the roof of this tower was intended as an airship docking station, but it was never actually used.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.