The name Drive-in Volcano sparks instant curiosity. It is the marketing moniker for the Qualibou caldera. The enormous lava domes were formed over 30,000 years ago. The last minor eruption occurred in 1766. Today, much of the barren land consists of volcanic vents, geothermal gurgles and puffs of steam rising from fumaroles. The 100 plus acre Soufrière Volcanic Park is a photo-worthy place to visit. But plug your nose against the prevalent smell of sulfur.