Ten famous geysers in Yellowstone, Iceland and New Zealand: mineral cones, water fountains and the quiet pool of Great Geysir. Old Faithful: NPS / Jacob W. Frank; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/thingstodo/yell_oldfaithful.htm; resized and fitted to portrait frame. Steamboat Geyser: NPS / Jacob W. Frank; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/places/000/steamboat-geyser.htm; resized and fitted to portrait frame. Castle Geyser: NPS/Neal Herbert; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/yell/learn/photosmultimedia/sounds-castlegeyser.htm; resized and fitted to portrait frame. Grand Geyser: NPS/Diane Renkin; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/yell/learn/kidsyouth/hydrothermal.htm; resized and fitted to portrait frame. Riverside Geyser: NPS / Neal Herbert; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/places/000/riverside-geyser.htm; resized and fitted to portrait frame. Daisy Geyser: NPS / Neal Herbert; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/places/000/daisy-geyser.htm; resized and fitted to portrait frame. Beehive Geyser: NPS/Jim Peaco; Public domain (NPS government photograph); https://www.nps.gov/aboutus/disclaimer.htm; https://www.nps.gov/yell/learn/kidsyouth/hydrothermal.htm; resized and fitted to portrait frame. Strokkur: Jerzystrzelecki|Jerzy Strzelecki; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Strokkur_25_(js).jpg; resized and fitted to portrait frame. Great Geysir: Villy Fink Isaksen; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Geysir_2015-08-09.jpg; resized and fitted to portrait frame. Pohutu Geyser: Marks6651; CC BY 4.0; https://creativecommons.org/licenses/by/4.0; https://commons.wikimedia.org/wiki/File:Pohutu_geyser.jpg; resized and fitted to portrait frame.