A bizarre roadside attraction and the first instance of miniature golf in the world.

A haunting tribute to pioneering photographer Clover Adams.

Megachurch turned Catholic church comprised of 10,000 glass panes.

More than five miles of underground passageways.

Abstract marble carving for an 8.5-pound rock.

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.

America's first federal monument.

Largest Roman Catholic church in North America.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

The world's longest known cave system.

This 1,500-acre development hopes to be the Central Park of the South.

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

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

This simple, broken column marks the final resting place of one of America's most famous explorers.

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

A miniature city built by a single hunchbacked monk.

A stockpile of childhood lunch pails turned collectibles.

Monument to the cotton-destroying boll weevil.

Once one of the largest producers of pig iron in the world.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.