Bagno Vignoni has no piazza. It has a piscina. The central square of this tiny Val d'Orcia hamlet (40 residents) is a rectangular hot spring pool (49m × 29m), built by the Medici in the 16th century over a thermal source known since Roman times. The water is 52°C, steaming year-round, surrounded by Renaissance porticoes and the loggia of the Palazzo dei Medici. Lorenzo il Magnifico bathed here. St. Catherine of Siena came for healing. Andrei Tarkovsky filmed the pool scene in Nostalgia (1983) here — the protagonist walking with a candle across the empty pool, one of the most haunting sequences in cinema history. You cannot bathe in the piazza pool (it's protected), but the free thermal cascades below the village (Parco dei Mulini) have pools where hot water flows over travertine ledges into the Orcia valley. Val d'Orcia → · Tuscany →
Plan my Val d'Orcia trip →The piazza-pool: Stand at the edge and look into the steaming water with the Val d'Orcia visible beyond — the combination of thermal mist, Renaissance architecture, and Tuscan landscape is dreamlike. At dawn or dusk, when steam is thickest, the effect is Tarkovsky-level. Parco dei Mulini (free thermal pools): Below the village — a series of natural travertine pools where hot water cascades down to the Orcia river. Free, open 24/7. Less dramatic than Saturnia's cascades but far fewer people. Hotel Posta Marcucci: A thermal hotel with an open-air pool fed by the spring water (€20-30 day pass for non-guests). Adler Thermae: The luxury option — a spa resort with thermal pools and Val d'Orcia views (€40-60 day spa).
Getting there: Car from San Quirico d'Orcia (5min). No public transport. Duration: 1-2 hours. Stay: €70-180/night (Hotel Le Terme — €80-130, thermal pool, the most direct experience). 40 residents means limited dining — Osteria del Leone (€30-45, excellent) is the main option. Combine with: San Quirico (5min), Pienza (15min), Montalcino (20min), Bagni San Filippo (20min — another free hot spring).