12. The Lighthouse of Alexandria (Pharos)
Constructed around 280 BCE under Ptolemy II Philadelphus, the Lighthouse of Alexandria, also known as the Pharos, guided sailors to the harbor of Alexandria, Egypt. Standing approximately 100 meters tall, it was among the tallest structures of the ancient world. The lighthouse was severely damaged by earthquakes between 956 and 1303 CE, leading to its eventual collapse. Today, remnants of the structure are submerged off Alexandria’s coast. (britannica.com).
