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

A bizarre house filled with an astounding array of collections.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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

Try not to get slimed in Tribeca.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

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

An emerald-green grotto just a short trip from Austin.

A snapshot of the city's fascinating voodoo culture.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A crumbling hospital from the 1850s on Roosevelt Island.

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

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A Prada store in the West Texas desert that is never open for business.

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

DIY collection of eclectic holdings.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

One part antique store, one part curiosities hodge-podge.