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

An Inca spa, military outpost or maybe… both?

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

The smallest post office in the United States is no bigger than a broom closet.

Found: Garden of Eden in Miami-Dade County, Florida.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

When this test site was abandoned, they didn't even bother to take the rocket with them.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

A large camera obscura, constructed entirely from digitally fabricated components.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

A mysterious air force base built to resemble a Long Island fishing village.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

A reproduction of a giant humanoid "fossil," a hoax buried locally for construction crews to find and gain national attention.