---
title: "Stone circles found in Argentina’s Andes remain unexplained"
url: "https://usubjects.com/article/stone-circles-found-in-argentinas-andes-remain-unexplained-3758"
updated: "2026-09-25T16:22:20.107Z"
description: "Reports describe large stone circles discovered at high altitude in Mendoza’s Cordillera del Tigre, Argentina, which some observers believe may be geoglyphs visible from space. The site’s purpose, age, and whether the formations are human-made remain undetermined."
sources: ["https://www.ancient-origins.net/news-history-archaeology/mendoza-geoglyphs-00103206"]
licence: "All rights reserved"
---

# Stone circles found in Argentina’s Andes remain unexplained

Published: 2026-09-25  
Source: [Tavily AI](https://www.ancient-origins.net/news-history-archaeology/mendoza-geoglyphs-00103206)

### Discovery in the High Andes

Large stone circles reported in Argentina’s **Cordillera del Tigre**, in Mendoza Province, have prompted speculation about whether they could be previously undocumented geoglyphs. The formations are located at high altitude in a remote section of the Andes, where harsh weather, difficult access and limited archaeological surveying can make field investigation challenging.

Accounts of the site describe broad circular arrangements of stones visible across the mountain landscape. Some observers have suggested that the patterns may be easier to recognize in satellite imagery or from an elevated viewpoint, leading to comparisons with geoglyphs such as Peru’s Nazca Lines. However, **there is currently no confirmed evidence that the circles were deliberately designed to be viewed from the air—or that they are human-made at all**.

### What Is Known—and What Is Not

The purpose, age and origin of the formations remain undetermined. No verified archaeological study, excavation report or formal dating analysis has been cited in the available accounts. As a result, it is not yet possible to establish whether the circles represent ceremonial construction, territorial markers, livestock-related features, relatively recent activity, or natural arrangements produced by erosion and the movement of rocks across steep terrain.

The term “geoglyph” generally refers to a large design or pattern created on the ground, often by arranging stones or removing the surface layer of soil. Across South America, ancient communities produced a range of geoglyphs and other landscape features, including the celebrated Nazca figures and numerous less widely known formations in the Andes. Those comparisons provide useful context, but **visual resemblance alone is not sufficient to identify a site as an archaeological geoglyph**.

### Natural and Human Explanations

High-altitude landscapes can create striking geometric appearances without deliberate construction. Rockfalls, glacial processes, erosion, slope movement and the gradual accumulation of stones around paths or temporary activity areas may all produce circular or linear patterns. Human activity is also common in mountain environments, where stone alignments can be associated with shelters, corrals, trails, ritual spaces or boundary systems.

Distinguishing between these possibilities would require detailed documentation. Researchers would need to map the circles, examine their construction methods, assess whether stones were transported or deliberately placed, and look for associated material such as ceramics, tools, hearths or organic remains. Satellite imagery and drone surveys could help determine the scale and geometry of the features, while geological and archaeological analysis could test whether the arrangements differ from the surrounding terrain.

### Why the Site Has Attracted Attention

The possibility of large, deliberately arranged forms in an isolated Andean setting has generated interest among observers of unexplained phenomena and ancient mysteries. Their apparent visibility from above has encouraged comparisons with famous geoglyph sites and, in some discussions, broader speculation about unusual or unknown purposes.

At present, however, **there is no reliable basis for linking the circles to extraterrestrial activity or other extraordinary explanations**. The central question is more fundamental: whether the formations are cultural features, natural geology, or a combination of both. The available report, published September 25, 2026, presents the site as an open mystery rather than a confirmed archaeological discovery.

### What Could Happen Next

A systematic investigation by Argentine archaeologists, geologists and heritage authorities could resolve much of the uncertainty. Before such work takes place, the Cordillera del Tigre circles should be treated as an unverified site requiring documentation rather than as proven ancient monuments. Further imagery, precise coordinates, on-the-ground photographs and independent expert assessment will be essential.

Until those data are available, the stone circles remain an intriguing but unresolved feature of the Andes—one that illustrates how satellite-era discoveries can raise important questions while leaving the underlying evidence still to be examined.

## Provenance

This USUBJECTS page is a summary or digest of the linked original source. Any accompanying generated visual is an illustrative reconstruction, not evidence.