Atlantis is a legendary island first mentioned by the ancient Greek philosopher Plato around 360 B.C. He described it as a powerful and advanced civilization that existed about 9,000 years before his time. According to Plato, Atlantis was located beyond the Pillars of Hercules, which is commonly identified as the Strait of Gibraltar. The story of Atlantis has captivated imaginations for centuries, leading to various theories about its existence and location. Some believe it was a real place, while others consider it a myth or allegory. Despite extensive searches and research, no definitive evidence of Atlantis has ever been found.