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 it possible to actually drive in a volcano - one of the most unique things to do in St. Lucia.Though the last major volcanic eruption in St. Lucia occurred about 40,000 years ago, this volcanic.