Quick FactsOverview
About Bagnaccio
Bagnaccio, Italy is a managed outdoor thermal spring park approximately 8 kilometres north of Viterbo in the Tuscia area of northern Lazio, situated along the ancient Via Francigena pilgrim route. The park is operated by the Associazione di Promozione Sociale Il Bagnaccio, which revitalised the site in 2013 after years of neglect. The spring water, known in Roman times as Aquae Passeris, is sulphate-bicarbonate-alkaline-earth and hyperthermal, emerging from the ground at approximately 63 degrees Celsius before being cooled for the pools.
The park contains six outdoor thermal pools numbered B0 to B5. B0 is the newest, fed from the dedicated Pozzo Bagnaccio well. B1, B2, and B3 are the largest central pools. B4 is the oldest, smaller and quieter. B5 is the family pool. Temperatures range from around 30 to 38 degrees Celsius across the pools. All pools are drained and refilled nightly with fresh thermal water.
The site includes a botanical garden maintained with the University of Tuscia, and the ruins of the Roman bath complex known as Bacucco. The acque termali of Bagnaccio have been in use since Roman times, when they were known as Aquae Passeris.
Location & Access
Getting to Bagnaccio
Bagnaccio is located on Strada del Garinei, an unpaved country road between Strada Martana and Strada Castiglione, approximately 8 kilometres north of Viterbo city centre. By car from Viterbo, take the Via Cassia (SS2) northwards and turn onto Strada del Garinei following signs for the thermal park. Free on-site parking is available for cars and a dedicated camper area is also on site. The road surface is unpaved for the final stretch; a standard car can manage it in normal conditions but the approach may be muddy after heavy rain.
There is no direct public bus service to Bagnaccio. Visitors arriving without a car can take a taxi from Viterbo, which takes around 15 minutes. From Viterbo train station, the site is not walkable in a practical sense given the distance and the unpaved road. Via Francigena pilgrims passing through the area will find Bagnaccio directly on the route, with a discounted entry rate available to holders of the official credenziale pilgrim passport.
Viterbo is served by direct regional trains from Rome in approximately 80 to 90 minutes. By car from Rome, take the A1 motorway towards Florence, exit at Orte, and continue on the Cassia towards Viterbo. For those exploring hot springs near Viterbo by car, Bagnaccio, Bullicame, and Piscine Carletti are all within a short drive of each other and can be combined in a single day. Free parking at Bagnaccio means no additional cost beyond the entry fee.
Suitability & Accessibility
Who Bagnaccio Suits
Bagnaccio suits adults and families seeking an authentic outdoor thermal spring experience with more infrastructure than Bullicame but without the cost of a full spa resort. The low-cost entry fee, six pools at varying temperatures, and the family-designated B5 pool make it accessible to a wide range of visitors. It is particularly popular with families, local residents, hikers on the Via Francigena, and visitors looking for a relaxed multi-hour outdoor soak in the open Tuscia countryside. The site is open year-round and night bathing is possible.
Children are welcome and the B0 and B1 pools, which are the coolest, are considered more suitable for younger visitors. Parents should use good judgement about which pools are appropriate for children based on temperature, and should supervise children at all times near the thermal channels between the pools, where water can be very hot. The dedicated family pool B5 provides a calmer area away from the busiest sections of the park.
Wheelchair access is not documented for this site. The approach road is unpaved and the ground is natural terrain with mineral deposits. The family hot springs near Viterbo at Bagnaccio suit visitors with general mobility, but there is no managed wheelchair infrastructure. Contact the association to confirm access.
Via Francigena pilgrims receive a discounted entry rate on presentation of the official credenziale passport. The site is open daily from 7am to midnight, and an annual membership is available for regular visitors at a low flat rate.
Safety & Etiquette
Bagnaccio Safety Tips
Bagnaccio is a managed but informal outdoor thermal park; it is not a staffed spa with lifeguards. The spring water source temperature is approximately 63 degrees Celsius, which is reduced before reaching the bathing pools, but the narrow channels that carry water between pools and to the pool inflows can still be very hot. Visitors are explicitly warned in the park's own rules not to touch or cross these channels. Take care when moving around the site and keep children away from the water distribution channels at all times.
The spring produces sulphate-bicarbonate thermal water with mild sulphur content and natural gas emissions, used by some visitors for insufflation therapy. Individuals with cardiovascular conditions, respiratory disorders, or sensitivity to mineral spring water should seek medical advice before bathing. Pregnant women should consult their doctor. The water has documented therapeutic properties for skin, joint, and respiratory conditions but these are not medically supervised at this site.
Swimwear is required. Rubber-soled pool shoes are recommended as the mineral- encrusted pool floors can be slippery. Eating inside the pools is not permitted. The site has portable toilets and a vending machine; no restaurant is on site, so bring food for a full day. Picnic tables are provided. A free-access pool outside the managed zone is also available without the entry fee.
Parking is free on site. The access road is unpaved and may be difficult after rain. The park is open until midnight; pools are not lit, so bring a torch for late visits. No booking required. Check current entry fees at bagnaccio.it before visiting, as prices vary by day.
