Categories: Disambiguation Green Dragon Spring at Norris Geyser A hot spring is a place where warm or hot groundwater issues from the ground on a regular basis for at least a predictable part of the year, and is significantly above the ambient ground temperature (which is usually around 55~57 F or... Fountain Paint Pots, Yellowstone National Park A mud pot (technically known as solfatare) is a hot spring or fumarole formed in high-temperature geothermal areas where water is in short supply. ... Solfatara is a shallow volcanic crater at Pozzuoli, near Naples, and is part of the Campi Flegrei volcanic area. ... A volcano is a geological landform (usually a mountain) where magma (rock of the earths interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. ... Location within Italy Naples (Italian Napoli, Neapolitan Napule, from Greek Νέα Πόλις - Néa Pólis - meaning New City) is the largest city in southern Italy and capital of Campania Region. ... Campi Flegrei (Burning Fields) is a large volcanic area situated in the west area of Napoli, Italy. ...