| http://www.w3.org/ns/prov#value | - The park area consists of a large caldera (exploded & collapsed supervolcano) that is still volcanically active with many geothermal features, including hot pools:Mud pots:And geysers: It can be a dangerous place to amble around off trail, as this warning sign tells us:The crowd at Old Faithful geyser is a good indication of how busy the park is on a given day:The Raven People find human crowds am
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