Aguas Termales De Aguas Calientes

The Aguas Termales de Aguas Calientes emerge in Aguas Calientes, a locality in Puntarenas Province, Costa Rica, in the mountainous interior of the country's Pacific south. Puntarenas extends from the Pacific coast up into the highland interior, and its geothermal activity reflects the ongoing subduction of the Cocos Plate beneath the Caribbean Plate — the same process that powers Costa Rica's volcanic chain.

These natural springs surface at 44 °C, among the highest temperatures recorded in Costa Rican hot springs, where the heat is intense enough to demand careful acclimatisation rather than immediate full immersion. The water is sulfurous and thermal, with a pH of 6.5, carrying the pronounced mineral character of volcanic springs. The combination of near-scalding heat, sulfur-laden water, and dense tropical forest surroundings gives these springs a raw, almost primordial quality — the kind of place that draws visitors who want their thermal experience genuinely untamed.