Parco dei Mulini

Bagno Vignoni's Mills Park follows the route of thermal water from the village's spring basin down a travertine slope toward the Orcia River. Four historic mills and their channels preserve an unusual system powered by perennial spring water.

Why it matters

The mills used thermal water from Bagno Vignoni's spring, a reliable source in the clay landscape of the Val d'Orcia. A steep drop between the basin and the river gave the water enough force to drive the mills. Their first documented reference dates to 1207.

What to notice

The four mills descend in sequence: Mulino di sopra, or da capo; Mulinobuca; Mulino di mezzo; and Mulino da piedi. The first two are carved largely underground into travertine. Lower down, the former wheel chambers, or carcerai, remain below the grinding rooms. Channels called gorelli carried water between the basins; the route ends near a pool below the cliff.

Context and history

The mills formed part of a hydraulic network serving the community of Rocca a Tentennano and later the town of San Quirico d'Orcia. Thermal water allowed milling to continue during summer, when other streams might run low. The complex fell into disuse as milling declined; its carved channels and chambers remain legible in the landscape.