In deep southern Tuscany, sulphurous water at 37 degrees tumbles over the Cascate del Mulino's tiers of natural travertine pools — free, open around the clock and gloriously pagan. Arrive at dawn or after dark to have the steaming cascades to yourselves; summer weekends get busy. Those wanting robes and treatments can book the Terme di Saturnia resort next to the spring itself, then eat wild boar pici in nearby Montemerano.
Featured in Ten spa and hot-spring escapes to switch off together · Romantic