Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Mount Malinao is a potentially active stratovolcano located in the Bicol Region of the Philippines. The volcano displays strong fumarolic activity which is harnessed for generating electricity. Located on its slope is Tiwi Geothermal Power Plant, one of the first geothermal energy plant commissioned in the country.
Insider tip — Tiwi Hot Springs in Albay Province sits within an active geothermal field on the eastern flank of the Bicol volcanic arc, where sulfurous steam vents and spring pools emerge from the same system powering one of the Philippines' largest geothermal power plants. The jungle setting and proximity to the Pacific coastline give the site a dramatic tropical-volcanic atmosphere. Water temperatures vary sharply between pools, with some approaching scalding — local guides are essential for identifying safe bathing spots. The area is also the gateway to whale shark watching in Donsol Bay, making it a compelling multi-activity destination.