Terme libere di Segesta (Polle del Crimiso)

What to expect

The terme libere di Segesta are a set of natural hot pools on the Fiume Caldo, the “hot river”, in the countryside of the province of Trapani in western Sicily. They sit at Ponte Bagni, in the comune of Castellammare del Golfo, right beside the paid spa called Terme Segestane. Locals also call them the Polle del Crimiso, after Krimisos, the river god of Greek myth who was said to have warmed the water for the nymph Egesta.

Here the river runs through a short gorge between walls of white travertine streaked with pink, with reeds and tamarisks along the banks. Hot sulphurous springs come out at the foot of the rock on the riverbank, at about 117°F47°C, and mix with the stream. The result is a string of pools of different temperatures. The largest is wide and shallow and has been partly closed off with a low wall of concrete and stone, with a few steps cut down into it. Upstream the gorge narrows into a small canyon with little falls, and some springs open right in the riverbed.

Explore a little and you will find warm cascades, quieter river bends where the water is milder, and a small cave full of steam. Fine clay mud settles on the bottom of the pools, and plenty of visitors smear it on their skin. The smell of sulphur is strong and stays on swimsuits.

There is nothing built for visitors: no staff, no changing rooms, no toilets, no bins. The paid spa next door is a separate business.

The water

The Wikipedia entry and a Balarm article written by a geologist describe the water as chloride, sulphate, alkaline-earth water, with a combined flow of about 110 litres a second at the Ponte Bagni springs. The springs are given as 113-122°F45-50°C. A travel guide updated in February 2026 puts the main bathing pools at about 104-109°F40-43°C, with cooler water where the springs mix with the river. Temperatures shift after heavy rain, when the river runs higher and colder.

Three named springs feed the area: the Bagno delle Femmine, the Grotta Regina and a newer spring called the Nuova Sorgente. The Grotta Regina, a natural steam cave, is part of the paid spa.

Getting there

• By car from Palermo: take the A29 toward Mazara del Vallo and leave at the Castellammare del Golfo exit, then follow signs for Segesta and Ponte Bagni along the SP2. It is about 69 km (43 miles), roughly an hour.
• From Castellammare del Golfo: about 7 km (4 miles) on the SP2, around 10 minutes.
• From Trapani: about 42 km (26 miles), around 45 minutes.

Just before the entrance to the paid Terme Segestane, a dirt track leads off to an informal car park. OpenStreetMap marks a free parking area there. From the car park a short path drops to the river, and you ford the Fiume Caldo to reach the pools. Guides describe the ford as easy at normal levels, but do not cross when the river is high and brown after storms.

Walkers can use CAI trail 623, which links Castellammare del Golfo with Ponte Bagni in about 7 km. By train, Castellammare del Golfo station is on the Palermo to Trapani line, but you still need a taxi or a long walk from there. Palermo and Trapani-Birgi airports are each about 50 km away.

When to go

The pools are open all year. Spring and autumn are the best seasons: warm enough to sit outside wet, cool enough that 104°F40°C water feels good. July and August are hot in this part of Sicily, and many guides suggest avoiding a midday soak then. Expect more people at weekends and on Italian holidays; weekday mornings are usually quieter. Winter visits work on dry, sunny days, but rain can raise the river and cool the pools.

Rules and etiquette

The site has no posted rules or management, which means its condition depends on visitors.

• Carry everything out, including food scraps, cans and cigarette ends. There are no bins.
• No soap or shampoo in the pools.
• Keep noise down, especially early and late, and share the main pool.
• Swimsuits are the norm here.
• Do not go into the paid spa grounds without a ticket.

Where to stay nearby

There is no lodging at the springs. Castellammare del Golfo, 7 km away, is the obvious base, a harbour town with a castle and plenty of hotels, rooms and restaurants. Scopello, on the coast west of town, has guesthouses and is the gateway to the Riserva Naturale dello Zingaro. Calatafimi-Segesta, inland, is closer to the archaeological site. Alcamo, to the east, is another option.

Safety notes

• Slippery footing: the travertine and the pool floors are slick. Water shoes help a lot.
• Hot spots: the water is hottest where the springs come out at the rock. Test with your hand and move downstream if it is too hot. Keep soaks short.
• Night visits: there are no marked trails or lights. If you stay until dark, bring a torch, and do not come alone.
• River levels: after heavy rain the Fiume Caldo can rise quickly. Do not ford a fast, muddy river.
• Water quality: this is untreated river water mixed with spring water. Keep your head above the surface and do not drink it.
• Car break-ins: leave nothing on show in the car at the informal car park.

Nearby stops worth adding

The Segesta archaeological park, with its Doric temple and hilltop Greek theatre, is about 10 km (6 miles) away, around 15 minutes by road. A morning at the temple and an afternoon soak is a natural pairing. On the coast, the Riserva Naturale dello Zingaro and the sea stacks at Scopello lie along the coast north-west of Castellammare.