The Balneario de l'Avellà is located in Morella, Castellón province, with thermal water around 36°C. Indoor pools, a sauna and massage services are on offer in this medieval town inland from Valencia.
Insider tip — Morella is a medieval fortress city in the Els Ports massif of northern Castellón — a walled hilltop town of extraordinary intactness presiding over one of Spain's most dramatic inland landscapes. Balneario de l'Avellà (Hazelnut Grove Baths) draws on the mineral springs of this ancient limestone plateau, where thermal water emerges from fissures of the Iberian range in a landscape unchanged since Roman legions camped here.