Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Nam Phu Ron Na Mueang — in Lao ນ້ຳພຸຮ້ອນ ນາເມືອງ — is a naturally sulphurous hot spring in Laos, where geothermal activity in the mountainous terrain of the Lao PDR brings warm, mineral-rich water to the surface in a landscape of forested mountains and fertile river valleys. Laos's geothermal resources, while less developed for tourism than those of neighbouring Thailand, are distributed across the country's highland zones and represent a significant natural asset for the emerging Lao eco-tourism sector. The spring provides warm, sulphurous mineral water in an authentic and relatively undiscovered Lao natural setting, inviting explorers to experience one of Southeast Asia's quieter thermal bathing traditions.
Insider tip — Nam Phu Hon Na Mueang (ນ້ຳພຸຮ້ອນ ນາເມືອງ) is a geothermal spring in central Laos near the Vientiane plain, where volcanic activity produces mildly sulfurous water at around 38°C. Simple timber pavilions shelter stone-lined soaking pools favored by Lao families during Buddhist holiday weekends. The surrounding rice paddy landscape and distant karst hills make for serene countryside bathing.