A 130-foot stone monolith has been discovered in the sea off of the Italian coast, that researchers say is at least 9,500 years old. The find was made during a high-resolution mapping survey of the seafloor off the coast of Sicily. The stone is in 40m (131 feet) of water, at a spot 60km (37 miles) south of the Italian island.
The regularly-shaped stone is 12m (39 feet) long and is estimated to weigh 15 tons. It has three 24-inch holes, two in it’s sides, and a third one at one end that passes completely through from one side to the other. While the monolith’s original function remains a mystery, one guess made by the researchers is that it may have been used as a lighthouse, with the hole in the end holding a torch as a beacon.