Mexico's largest collection of masks is found in the ruins of an abandoned convent.

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

During World War II, this rice mill became a Nazi concentration camp.

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

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

This museum covers 10,000 years of Pre-Columbian Latin American history.

This modernist building is the last remnant of an ambitious plan to restore a neighborhood.

The ruins of the second of three churches dedicated to the saint in a touristic Scottish town.

An abandoned shipping control tower looks like a satellite perched at the end of a pier.

This picturesque mansion has gone from opulent ruin to nature museum.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

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

These delicate ruins need more tourists to keep them from fading away.

A Victorian cemetery hidden along a trucking route is all that remains of a 19th century village.

Historic psychiatric asylum and most-filmed location in the Great White North.

With the chapel itself being left to moulder, the cemetery of this abandoned church might be the freshest part.

An abandoned Victorian-era mill in the middle of modern Manchester.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

Pause in an abandoned hydroelectric station, now overrun with wildlife, to consider a thought-provoking poem.