What was once the largest NFL stadium.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

The only surviving prototype for Buckminster Fuller's house of the future.

A Beaux-Arts triumph set to become Ford's innovation campus

Museum preserving torture methods from the past.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The silly symbol for an underground protest group is now scattered around the city.

Real bones which are said to have belonged to a Polish dragon.

This man-made mound monument was built out of soil from all across the Polish empire.

Thousands of volcanic rocks carved 1,000 years ago.

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

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

Death rituals and sacrifice inside a Peruvian megalith.

Huge stone depressions which may have acted as an Incan agricultural experiment.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

This stone complex marks the urban center of a lost civilization.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Detroit housing collective working to create an "environment for revolutionary change."