Named for the sulfur once mined at this site, Mount Soufriere (also known as Sulphur Springs Park) is the most active geothermal area in the Lesser Antilles. A road traverses the edge of the 274-meter crater making this one of the world's rare "drive-through" volcanoes. Though the last major volcanic eruption in St. Lucia occurred about 40,000 years ago, this volcanic pit continues to vent sulfur into the air and heat pools of water above boiling. You can view the bubbling pools and hissing fumaroles from observation platforms and soak in some nearby therapeutic springs.