Terme di Saturnia, Natural hot spring in Manciano, Italy.
Terme di Saturnia is a natural hot spring in Saturnia, a village within the municipality of Manciano in Tuscany. The warm water flows over limestone terraces and forms several shallow pools where sulfur vapors rise above the surface.
The Etruscans discovered the springs more than 3000 years ago and used them for ritual bathing. In the 2nd century BC, the Romans founded a settlement nearby and built the first thermal baths around the pools.
Local people still visit the pools at dawn and dusk to soak in the warm water, treating them as a shared space for quiet conversation and relaxation. The name Saturnia refers to the god Saturn, and legends say the springs appeared after a divine battle between ancient powers.
The springs remain open all year round and accessible at any hour without an entrance fee. A free parking area sits near the cascades, but the site can get crowded during high season, so arriving early in the morning or late in the evening helps avoid the crowds.
The water maintains a steady temperature of 37.5 degrees Celsius all year round, even during winter. The high concentration of sulfur and thermal plankton makes the water slightly cloudy and gives it a distinctive smell.
Location: Saturnia
GPS coordinates: 42.65810,11.51620
Latest update: December 4, 2025 23:00
Hot springs form where geothermal activity or groundwater systems naturally heat water. This collection features such springs across volcanic zones, mountain ranges and remote areas on all continents. Each location has distinct mineral content and temperatures shaped by its underlying geology. In Iceland, the Blue Lagoon offers mineral-rich water in a lava field near Grindavík, while Deildartunguhver in the west produces one of Europe's most powerful hot springs. Pamukkale in Turkey's Denizli region displays terraced limestone pools formed by calcium-rich thermal water. The Széchenyi Baths in Budapest draw water exceeding 160 degrees Fahrenheit (70 degrees Celsius) from nearly 4,300 feet (1,300 meters) below ground. In Wyoming, Yellowstone's Grand Prismatic Spring shows intense colors produced by its size and thermophilic bacteria. Japan hosts numerous onsen, including Takaragawa in Gunma Prefecture along a river and Yubatake in Kusatsu with visible high mineral output. Jigokudani Monkey Park in Nagano is known for macaques that bathe there. In North America, the collection spans Banff Upper Hot Springs in Alberta, Chena Hot Springs in Alaska and smaller sites such as Baker Hot Springs in Utah. Grutas Tolantongo in Hidalgo, Mexico, combines warm pools with river flows in a canyon. New Zealand's geothermal zones appear at Champagne Pool in Waiotapu and Hell's Gate Park near Rotorua.
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Sovana
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San Giorgio
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Castle of Rocchette di Fazio
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Madonna delle Grazie (Semproniano)
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Church of Saint Maria
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Terme Di Saturnia Spa & Golf
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Piazza della Chiesa
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