Archaeologists reveal why Peru’s mysterious rock holes puzzled experts for decades

January 14, 2026

The enigmatic “Band of Holes” in Peru has mystified archaeologists for nearly a century, stirring up myriad theories about its purpose. Stretching almost a mile across the dry, rugged hills of the Pisco Valley, this site features more than 5,200 circular depressions, each between 3 to 6 feet wide and up to 3 feet deep. Ranging from speculation about ancient fortifications to even extraterrestrial origins, interpretations of this landscape have captivated imaginations. However, a groundbreaking study led by Dr. Jacob L. Bongers of the University of Sydney may finally shed light on this long-standing mystery.

Recent research suggests that these holes were not mere curiosities but served as a sophisticated Indigenous system for record-keeping and trade. This research, published in the journal Antiquity, indicates the site may have originated as a bustling marketplace during the Chincha Kingdom, evolving under Inca rule into a formal tribute-collection centre. The implications extend beyond just the site’s identity; they challenge long-held beliefs about pre-Columbian economies and documentations. This new perspective invites a deeper appreciation of the complexities of ancient Andean societies and their innovative approaches to trade and communication.

Unearthing the Truth behind Peru’s Rock Holes

For decades, these mysterious pits have intrigued specialists and lay enthusiasts alike, as modern drone technology revealed intricate patterns in their design. The mathematical arrangements, resembling sequences found in ancient accounting devices known as khipus, point towards intentional planning rather than random excavations. This newfound clarity underlines the importance of embracing advanced techniques in archaeological studies.

Evidence of Trade and Record Keeping

The investigation highlighted not just the physical attributes of the holes, but also what lay within them. Analyses of sediment samples discovered traces of crops like maize and squash, reinforcing the idea that these pits were vital to the economic exchanges within the ancient Chincha Kingdom. History paints a picture of skilled merchant communities who navigated both land and sea, and these holes may have served as structured hubs for trade.

Rethinking Ancient Civilizations

Dr. Bongers and his colleagues argue that the transition from market to tribute-collection site illustrates how Indigenous communities modified their surroundings to facilitate interaction and commerce. This adaptation underscores the sophistication of pre-Hispanic organizational systems, revealing complex networks of value and exchange that thrived without a written language.

A Scientific Approach to Archaeological Mysteries

Moving away from speculative narratives often associated with the site, this study reinstates the cultural significance of Monte Sierpe. As Dr. Charles Stanish states, it combats pseudoscientific claims that diminish Indigenous peoples’ rightful place in history. The evidence gathered not only elucidates the Band of Holes’ utilitarian aspect but also highlights Indigenous knowledge and innovation long before European contact. This research encourages a reflective perspective on how communities have historically structured their economic activities.