Descend into the world's only drive-in volcano at Sulphur Springs, then soak in geothermal mineral mud pools said to rejuvenate skin and spirit. One of the Caribbean's most otherworldly, bucket-list natural wonders.
What to expect
Your private guide narrates the volcanic geology as steam vents bubble beside the road — the caldera is astonishingly close. The therapeutic grey mud is slathered on by enthusiastic local attendants, then you rinse in warm mineral waterfall pools. Nearby Diamond Botanical Gardens (entry USD 8) pair perfectly for a lush, fragrant finale. The whole circuit from Castries takes about 4–5 hours.
Good to know
Soufrière is roughly 1.5 hrs from Castries by road; confirm all-aboard before booking. Wear a swimsuit you don't mind staining. A private minivan (seats 4–6) can be arranged directly at the pier through vetted taxi associations.