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

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

A tall karst islet popularized by 007.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

Derelict airplane bodies serve as both home and income for three Thai families.

Cuba's historical trains remind natives of their country's sugary sweet past.

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

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

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

This Cuban town sets the sky on fire around Christmas each year.

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

Ride a boat through this magnificent underground world, which now doubles as a theater.

The ruins of a medieval village that was abandoned after a 19th-century inferno.

This small but lovely sinkhole lake is the last remnant of a great prehistoric water basin.

Legend said this huge, gnarled tree sheltered the saint during a storm.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

An abandoned bell tower in the middle of nowhere is the last testimony of a forgotten medieval village.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

A fascist-era rural village abandoned since the early 1980s.