Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Gharesu Hot Spring, near Qaemshahr in Iran's Mazandaran province, offers an open-air pool of sulfurous water reaching 40°C. The site, a wild-bathing spot, lies in this northern Iranian region bordering the Caspian Sea.
Insider tip — Gharesu Hot Spring emerges in the forested foothills south of the Caspian Sea in Mazandaran province, part of Iran's northern volcanic arc. The Alborz range here receives heavy rainfall, and the springs emerge through dense Hyrcanian forest, one of the world's oldest temperate forest ecosystems and a UNESCO World Heritage site. The contrast between the cool forest air and the warm mineral waters makes for a particularly restorative experience.