Romans took control of Pompeii around 200 BC, and by the 1st century AD it was a prosperous city of perhaps 11,000 to 13,000 people. What makes the site extraordinary is not its importance -- it was a provincial town, not a capital -- but the completeness of its preservation. The eruption killed the inhabitants and sealed everything else in place. Bread still sits in bakery ovens. Jars of preserved food line thermopolia counters, the Roman equivalent of fast-food stalls, where customers once bought ready-to-eat meals from ceramic vessels set into stone countertops. Cart ruts groove the paving stones of the streets, and raised stepping stones allowed pedestrians to cross without wading through the water and waste that flowed along the roadway. Tiny mosaic tiles called cat's eyes are embedded in the ground -- they reflected moonlight and candlelight, serving as ancient streetlights. At the House of the Baker, millstones of volcanic stone still stand where workers once ground wheat into flour.

Pompeii's public buildings reveal a city that took its pleasures seriously. The Forum served as the civic, religious, and commercial heart -- a rectangular piazza surrounded by temples, government offices, and market halls. Multiple bath complexes offered Romans their daily social ritual of hot and cold plunges, exercise, and conversation. The amphitheater, one of the oldest surviving Roman amphitheaters, seated roughly 20,000 spectators for gladiatorial combat. Two theaters hosted plays and musical performances. The Villa of the Mysteries, located outside the city walls, contains some of the greatest surviving Roman frescoes -- vivid, life-sized scenes of what scholars believe depict an initiation into the Dionysian mysteries, with figures rendered in deep reds and blues against richly colored walls. Even small houses yield surprises: wander into random villas and you may find rooms decorated with delicate frescoes that survived nineteen centuries underground, their colors still vivid.

In the southeast corner of the excavated city lies the Garden of the Fugitives, where thirteen plaster casts of eruption victims are displayed exactly where they fell -- adults and children caught in their final attempt to flee. The plants growing around them have been reconstructed to match ancient species, based on Fiorelli's technique applied to root cavities rather than human remains. This intersection of botanical science and human tragedy captures something essential about Pompeii: every layer of investigation reveals more about how these people actually lived, and how they died. At the Antiquarium of nearby Boscoreale, a transparent epoxy resin cast made in 1984 allows visitors to see the jewelry and personal objects a victim was carrying -- small, private possessions that someone grabbed in the final minutes before the ash came. Pompeii forces an uncomfortable proximity to catastrophe. The people who died here were not historical abstractions. They were bakers and merchants, mothers and enslaved workers, people who woke up that August morning expecting an ordinary day.

Mount Vesuvius remains an active volcano, and the city of Pompeii today sits within its potential blast zone, along with Naples and its three million metropolitan residents. Scientists monitor the mountain continuously, and early-warning systems have been devised to detect impending eruptions. Meanwhile, the archaeological site draws vast crowds -- entrance is capped at 20,000 visitors per day, an ironic echo of the ancient city's population. Walking the old stone roads can take an entire day, and even then you will not see everything. Many streets that appear open on the map turn out to be closed for ongoing excavations or repairs. A building collapsed as recently as 2010, a reminder that preserving an ancient city is a perpetual struggle against time, weather, and the sheer fragility of two-thousand-year-old structures. Herculaneum, Pompeii's smaller neighbor on the same Circumvesuviana rail line, suffered a different fate -- buried by a pyroclastic surge rather than ash, which preserved upper stories and organic materials that Pompeii's burial did not. Together, the two sites offer the most intimate portrait of Roman civilization that survives.