This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This is why we can't have nice things on the Incan Trail.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

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

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

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

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

The world-record holder for the longest bridge stretching continuously over water.

Local myth claims this is a Sears catalogue home with its windows installed upside-down.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

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

The juke joint where legendary soul artists ate, drank, and made merry.

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

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Enormous lake at the bottom of a unique cave system.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.