An underwater “Stonehenge” stretches for miles under a lake in Europe. “I think it was something with a cultic context,” one researcher theorized.
Archaeologists are trying to piece together the mystery of an underwater trail of ancient rock piles, or cairns, that stretch for miles under the shimmering waters of Lake Constance, a glacial lake that lies between Germany, Austria, and Switzerland, and which appear to have been made by humans who lived some 5,500 years ago, according to a 2021 study.
The huge cairns have attracted public attention and expert debate ever since they were first discovered in 2015 by the Institute for Lake Research in Langenargen. Roughly 170 of these rock formations are arranged in a line under the shallow waters of Lake Constance, several hundred feet from its southwest Swiss shore.
A team led by Urs Leuzinger, an archaeologist at the Museum of Archaeology of the Canton of Thurgau, have amassed compelling evidence that the rock formations were made by humans who lived in the area during the Neolithic period.