Why does this forest look like a fingerprint?

We set out to solve why a forest in the middle of Uruguay looked like that — and wound up discovering something much bigger.

Deep in the geographic center of Uruguay, there’s a peculiar group of trees just a few kilometers down the road from the small town of San Gregorio de Polanco. From the ground, it looks like any other forest, with tall trees reaching deep as far as the eyes can see. But from above, the view is mind-boggling: Hundreds of trees are arranged in perfect concentric arcs, all spiraling toward the center. Together, they look remarkably like a human fingerprint.

When we first saw this forest, thanks to a Reddit post, we were fascinated. Why had they been arranged in this shape? Who planted them there? And why — when you zoom out on satellite view — was the entire country of Uruguay covered in similar-looking forests? To answer that question, we went straight to the source: interviewing locals, experts, and people whose lives have been shaped by a transformed landscape and economy.