Escape the city heat with a day in Tivoli, where waterfalls, ruins, and Renaissance gardens offer a cool, scenic retreat. We’ll walk the wooded trails of Villa Gregoriana, hear how a pope rerouted a river to save a town, and peek at the grandeur of Villa d’Este and Villa Adriana. With nature, history, and a bit of Roman engineering magic, Tivoli is where emperors—and now the Hansens—go to unwind.