"Steam Vents & 'Iliahi Trail - Sulphur Banks." Top 5 Page for this destination Steam Vents Tip by Jerelis
Steam Vents, Hawaii Volcanoes National Park: 7 reviews and 16 photos
Ground water seeps down to the hot volcanic rocks and return to surface as steam, especially near the Caldera Rim. Be aware that you'll be all wet after this "Bath from Pele"!
Just a bit further up north we saw the Sulphur Banks. At this spot volcanic gases seep out along with groundwater steam. These gases are rich in carbon dioxide, sulphur dioxide and hydrogen sulfide, the one that smells like rotten eggs. Some gases desposit pure crystals at the banks. Other gases form acid which breaks down the lava to clay. This is stained red and brown with iron oxide.
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