The Aptrepa Cave, located near the Bay of Delos on the Maina Peninsula, is the size of four football fields  The cave dates back to the Neolithic Age, but it was not until the 1950s that it was accidentally discovered by a man walking his dog
After decades of scientific research, archaeologists unearthed tools, pottery, obsidian, silver and copper utensils from the cave, which led to the belief that hundreds of people had lived in the cave
The cave inspired the description of hell in Greek mythology