Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Aik Kalak Hot Spring is located near Bayan village in northern Lombok, at the foot of Mount Rinjani in a region considered the heartland of the Wetu Telu community — practitioners of a syncretic form of Islam unique to northern Lombok that blends Islamic faith with animist traditions, ancestor veneration, and Sasak customary law in ways that reflect centuries of gradual religious synthesis. Nearby Bayan Mosque, believed to be the oldest mosque on Lombok and dating to the 15th century, stands as a living monument to this layered spiritual heritage. The volcanic hot springs here draw thermal waters from Rinjani's geothermal system, providing mineral-rich bathing in a setting of extraordinary cultural depth where ancient faith, volcanic landscape, and traditional Sasak life intersect.
Insider tip — Aik Kalak sits on the volcanic northern coast of Lombok near the foothills of Mount Rinjani, Indonesia's second-highest volcano and a site of pilgrimage for Balinese Hindus and Sasak Muslims alike. The sulfurous springs discharge into a river gorge shaded by tropical bamboo and fig trees, creating natural rock pools where hot and cool waters blend. The overland approach from Senggigi takes you through traditional Sasak village compounds with distinctive double-roofed rice-thatch architecture. Water flow and pool depth change dramatically between the dry and wet seasons.
