The only structure left with direct ties to the Salem witchcraft trials of 1692.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

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

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

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

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

FDR hoped to find a cure for polio in this Georgia town's warm springs.

A vision of beautiful Hindu architecture in the middle of the American South.

An underground magnet for ever-changing street art.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Mai Tais and Navy Grog served up in one of the original tiki bars.

A museum and doll store featuring a surreal and super sanitized version of where babies come from.

A man's home is his castle.

Enormous lake at the bottom of a unique cave system.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

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

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

More than five miles of underground passageways.

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

Live long and prosper in Tennessee.