Lonely Planet review
Caldes de Montbui , 28km north of Barcelona, hosts three thermal bath hotels. You can use the facilities even if you don’t stay in the hotels, although the price can mount depending on what you opt for. Broquetas Balneario is the town’s historic spa hotel, in front of the Roman baths, and a public fountain (Font del Lleó) from which water has been spouting forth at a scorching 74°C since the 16th century. Founded in the 18th century and rebuilt several times, it is a predominantly Modernista building. Inside it boasts an original Roman vaporarium , a 2nd-century AD steam bath. A session in the thermal pool and cervical showers costs €22 (or €28 for two people). This gives you 20 minutes, plus the use of the outdoor heated pool. Book ahead.