The road, which was built 7000 years ago, was found at the bottom of the Mediterranean Sea. It was hidden under layers of sea mud off the southern coast of Croatia, Science Alert reports.
This fascinating find, made at the sunken Neolithic settlement of Solini, may have once linked the ancient settlement of the Hvar culture to the now-isolated island of Korčula.
The prehistoric road was protected from strong waves for thousands of years. The passage, about 4 meters wide, was built from carefully stacked stone slabs.
Researchers believe that the Hvar culture of the Neolithic era, which once inhabited the eastern Adriatic, built the now-submerged settlement of Solini and the ancient passage connecting the islands.
Using radiocarbon dating of the surviving wood, the entire settlement was dated to approximately 4900 BC.