The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

A collection of huge Pre-Colombian structures in Alabama.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Continuing the tradition of the dime museum in style.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This shallow cave got its name from copious amount of human bones found inside.

Where most of the world's flypaper was made.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The first American department store, and home to the largest operating musical instrument in the world.

This elaborate towering structure was once famed for its revolutionary height.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A monument celebrating the idea of reaching inaccessible places.