Steam Vents and Sulphur Banks
A short walk from the Kilauea Visitor Center leads to the pungent yet fascinating Sulphur Banks, where gases composed of hydrogen sulfide produce a smell akin to rotten eggs. Most of the rocks surrounding the vents are chemically stained with a yellow hue due to constant gas exposure. Throughout the surrounding landscape, dozens of active steam vents emit white, billowing vapors that originate from groundwater heated by volcanic rocks. Located on the caldera's edge, Steaming Bluff is a short walk from a nearby parking area. The best steam vents are across the road from the main steam vent parking area; they vary in size and are scattered alongside the dirt trails.