The Fonte Bonifacio VIII is the elder of Fiuggi's two main springs and the one that made the town famous. The source sits in an elegant early-20th-century park, where a colonnaded building shelters the taps where visitors line up with small cups to drink. The water is cold, lightly mineralized, and distinctly diuretic — plan your walks accordingly.
The spring is named for Pope Boniface VIII, who credited the waters with clearing his kidney stones in 1298, and the papal endorsement turned a modest hill spring into a European destination. Today the ritual of taking the waters feels pleasantly old-fashioned: spa-goers stroll under the lime trees between sips, and the park fills with Italian retirees doing exactly what Italian retirees have done here for a century.