An ancient capital city that dates back 3,000 years old and harbors many surprises.

The rocks in this arid basin leave trails of movement behind them.

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.

A church of bones, decorated with 40,000 human skeletons.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

An eerie, derelict amusement park in Berlin.

A snapshot of the city's fascinating voodoo culture.

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

Medicinal spa created with the discharge from a geothermal energy plant.

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

A psychedelic labyrinth on the San Francisco bay.

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

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

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

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

An exquisite tunnel of cascading flowers.

Rippling sand dunes frozen in the Arizona rock.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A huge musical instrument played by the ocean.

A mysterious spot where the laws of gravity seem not to apply.

This little town supplies Japan with most of its calligraphy brushes, still made by hand from animal fur.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.