No, it wasn’t built by aliens. But accountants? Maybe. Researchers used drones to get another look at the "Band of Holes" along Monte Sierpe, and their work suggests that the Inca may have ...

New research suggests the Band of Holes functioned as a barter marketplace before becoming an accounting system for the Inca ...

This mountainside is covered in thousands of mysterious ancient holes. Scientists now believe they know why - Early aerial ...

Peru 's Monte Sierpe, a site featuring thousands of holes snaking across a mountainside in the Andes, has long puzzled ...

New research suggests the Band of Holes in southern Peru may have been first a market and later an Inca accounting device.

Read about photographer Jim Richardson's experience with travel photography and get advice on trying new photography techniques from National Geographic.

New research suggests that the holes were the site of an ancient marketplace, and Inca rulers may have used them as a ...

The site, known in Spanish as Monte Sierpe (Serpent Mountain), first came to broader attention after an aerial photograph of the stone-lined holes was taken in the 1930s and published in National ...

Sediment analysis and drone photography of the iconic South American monument of Monte Sierpe (aka "Band of Holes") support a new interpretation of this mysterious landscape feature as part of an ...