The temples at Paestum span a hundred years of Greek architectural evolution, and walking south to north reads like a textbook come to life. The oldest, the Temple of Hera I, dates to around 550 BC and is wider than most Greek temples, with nine columns across its front and eighteen along its sides. It belongs to the archaic Doric order -- heavy, powerful, built to impress gods and mortals alike. A half-century later, the Temple of Athena rose on the site's highest ground, around 500 BC. With six columns across and thirteen along the sides, it is credited as the first known temple in the world to combine Doric columns on the exterior with Ionic columns in the porch -- a moment of architectural daring that merged two traditions into something new. Then came the masterpiece: the Temple of Hera II, built around 450 BC and modeled after the Temple of Zeus at Olympia. Its columns rest on a base that humps up slightly in the center, correcting the optical illusion of sagging -- the same refinement the builders of the Parthenon would later make famous. All three temples face east, their doorways greeting the rising sun.

Greek colonists from Sybaris founded the settlement around 600 BC, calling it Poseidonia after the god of the sea. For two centuries it thrived as a Greek city-state, complete with an Ekklesiasterion -- a sunken circular assembly hall large enough for 500 citizens -- proving that democracy was practiced here, not just theorized. Around 400 BC, the Lucanians, an Italic people from the mountains, conquered the city and gave it a new character. Then Rome came, as Rome always did. In 273 BC the Romans established a colony and renamed the place Paestum. They built an amphitheater, paved the Via Sacra straight through the settlement's center, erected houses and forums, and wrapped the entire city in a wall with gates at the four compass points. The Roman walls still stand, enclosing a space where most of the ancient city -- Greek and Roman alike -- remains unexcavated, waiting beneath the Campanian soil.

Among Paestum's most startling discoveries is the Heroon, a Greek memorial tomb from around 520 BC, found in 1952 buried in the middle of the settlement -- an unusual location that suggests the person interred was of extraordinary significance. Intact vases recovered from the tomb are displayed in the Archaeological Museum adjacent to the site. But the museum's most famous holdings are the painted tomb slabs, particularly the Tomb of the Diver, dating to around 480 BC -- one of the only surviving examples of Greek painting from the classical period. The image shows a young man mid-dive, arcing through empty space between a stone platform and the water below. Art historians have debated its meaning for decades: is the dive a metaphor for the passage from life to death, or simply a scene from a symposium? Either way, it is a rare window into an art form that has almost entirely vanished.

Step outside the archaeological park and the landscape shifts abruptly from antiquity to agriculture. The flat Campanian plain surrounding Paestum is home to water buffalo farms that produce Mozzarella di Bufala Campana -- a cheese with protected designation of origin status and a flavor that bears no resemblance to the rubbery supermarket version. Restaurants near the museum serve it with tomatoes, on pizza, stuffed in calzone, or simply drizzled with olive oil. The beach lies a 30-minute walk west of the ruins, and the combination of ancient Greek temples in the morning and Tyrrhenian Sea swimming in the afternoon is one of southern Italy's more civilized pleasures. The regional train from Salerno takes about 30 minutes; from Naples, roughly an hour and a half. Paestum station sits just east of the ancient walls, a ten-minute walk through the Porta Silena to the museum and temples beyond.