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

Try not to get slimed in Tribeca.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Dramatic river bend surrounds a natural red-rocked pedestal.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

These fantastically named natural pools look like something out of a Scottish myth.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A snapshot of the city's fascinating voodoo culture.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Rippling sand dunes frozen in the Arizona rock.