Billed as “the Caribbean’s only drive-in volcano,” Sulphur Springs Park is one of the most active geothermal sites in the Lesser Antilles. Guided tours through the caldera of the dormant Soufriere Volcano take about 30 minutes and allow visitors to explore the stark, lunar landscape pockmarked by steam vents and pools of boiling mud and water, where the air is tinged by the acrid scent of sulphur from the venting fumaroles. Downstream from the boiling pools, a pair of bathing pools has water that has cooled to a comfortable 38.7 degrees C (101.6 F). The Black Water Pool—famed for its reputed health properties—is so rich with dissolved minerals that the waters are tinged black, while the Pool of Love has clear, warm water where visitors can soak in the natural hot tub surrounded by rainforest.
Sulphur Springs Park is a 5 minute bus ride or 30 minute walk from the town center of Soufriere, which sits along the southwest coast, about 40 km (25 miles) from Castries. A guided tour of the springs and soak in the baths costs $11 per person ($5 per child). Sulpher Spring Park is open daily from 9 a.m. to 5 p.m., except for the first Friday in September.