When Cardinal Ippolito d'Este understood he would never be pope, he consoled himself by building paradise: from 1550, with architect Pirro Ligorio, he turned a Tivoli convent into the villa that redefined the Italian garden. Five hundred fountains, tricks and jets, still moved by nothing but the gravity of the Aniene river: no pumps, only sixteenth-century engineering. UNESCO-listed since 2001.
What to see
The Avenue of the Hundred Fountains, moss-covered like an enchanted corridor; the Organ Fountain, which truly plays at set times thanks to its hydraulic mechanism; the Neptune Fountain with its cannon-jets, and the Rometta, a miniature Rome in water. Inside the villa, the Mannerist frescoes of the cardinal's apartments prepare you for the spectacle of the terraced gardens.
Visiting
Two full hours across villa and gardens, downhill on the way out and — remember it — uphill on the way back. The Organ plays at regular intervals from late morning: ask the time at the entrance and build your circuit around it. On summer nights, the illuminated openings reveal another villa entirely.
Getting there
Tivoli is a good half hour from Rome: train from Tiburtina or bus from Ponte Mammolo metro. The villa stands in the old centre, steps from the main square; Hadrian's Villa, Tivoli's other wonder, lies five kilometres away and deserves its own half day.
Our editors' tip
Arrive at opening and head straight down to the Hundred Fountains before the groups: the green corridor in morning light, water the only sound, is the villa's perfect moment. And do not pair d'Este and Hadrian's on the same summer day: wonders, sweated through, are halved.