Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
On Basse-Terre island in Guadeloupe, this sulfurous hot spring emerges at around 40°C. Of volcanic origin, it lends itself to open-air wild bathing, away from any heavy tourist infrastructure.
Insider tip — Guadeloupe's Basse-Terre island is dominated by the active La Soufriere volcano, whose hydrothermal activity feeds sulfurous springs throughout the forested southern flank. The hot spring sits amid lush tropical rainforest at relatively low elevation, surrounded by tree ferns and heliconia. Volcanic gases lend the water a distinctive rotten-egg scent typical of acid-sulfate systems close to a live fumarole field. Visitors should wear old swimwear as the sulfur can stain fabric, and note that water chemistry fluctuates with volcanic activity.