As you approach the volcano, your nose will pick up the strong scent of sulfur from more than 20 belching pools of murky water, crusty sulfur deposits, and other multicolor minerals baking and steaming on the surface. Despite its name, you don't actually drive all the way in. Rather, you drive within a few hundred feet of the gurgling, steaming mass and then walk behind your guide—whose service is included in the admission price—around a fault in the substratum rock. It's a fascinating, educational half-hour, though it can also be pretty stinky on a hot day.
Soufrière, St. Lucia