Tivoli lies in the hilly Latium region, just 30 kilometers from Rome, and holds two UNESCO sites within a single day's visit. Villa Adriana is a vast imperial complex from the 2nd century, spread across 40 hectares of ruins, pools, and colonnades — it is one of the largest preserved imperial complexes outside Rome itself. Villa d'Este, on the other hand, occupies the opposite end of the spectrum: terraced gardens with fountains that operate on water pressure alone, without electricity, without pumps. The town itself is not merely a transit stop — a Gothic street, the Ponte Gregoriano bridge, and the gorge below it deserve an hour or two of strolling before or after the villas.