Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
The thermal pools of Ahuachapán are natural geothermal springs near the departmental capital of Ahuachapán in western El Salvador's most thermally active zone, where bicarbonate- and sulphate-rich water surfaces from the same geothermal reservoir that powers the Ahuachapán Geothermal Complex — one of the oldest geothermal electricity facilities in the Americas, generating power since 1975. The thermal pools, developed for public bathing, allow visitors to directly experience the geothermal energy that powers a significant portion of El Salvador's electricity supply in a country committed to expanding its renewable energy base. The colonial city of Ahuachapán, with its 18th-century churches, traditional market culture, and position as the gateway to the scenic Ruta de las Flores, provides an excellent base for exploring the region's thermal heritage.
Insider tip — These thermal pools near Ahuachapan are embedded in El Salvador's geothermal belt, where Pacific subduction drives intense volcanic heat close to the surface. The outdoor pools are shaded by mango and plantain trees, creating a tropical garden atmosphere just minutes from the town center. Weekend afternoons draw Salvadoran families who come for both the relaxing waters and the festive food stalls that line the entrance.