Poseidonia, also known as Paestum, is an ancient Greek city located in southern Italy. Founded in the 6th century BCE, it was originally a settlement of the Sybarites and later became a thriving center for trade and agriculture. The city is renowned for its well-preserved Greek temples, which are among the best examples of ancient architecture in the world. Today, Poseidonia is a UNESCO World Heritage Site, attracting visitors who come to admire its historical significance and stunning ruins. The site features three major temples dedicated to the gods Hera, Athena, and Apollo, showcasing the artistic and cultural achievements of ancient Greece.