A turquoise lake within a volcanic crater.

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

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

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

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

A castle-inspired apartment building that has stood in Birmingham since 1927.

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

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.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

Once a bustling cotton factory, this early 20th-century building is now home to a thriving artspace.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

This ghost town houses the remains of Alabama's old state capital.

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.

These ruins are all that's left of the former Alabama State Capitol.

An autonomous oak in Alabama.

This small hut in the middle of a parking lot was once the wooded sanctuary of the 'Hermit of Montrose.'

Come for the boats, stay to explore the intriguing assortment of art.

A rusted metal giant pays tribute to Birmingham’s industrial past.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.