Wikimedi'Òc

Lakeshore Geyser in winter.jpg - SunRuikang

Pump Geyser (early afternoon, 3 June 2014) 3.jpg - Ser Amantio di Nicolao

Bison near Mud Volcano (8284365107).jpg - Ser Amantio di Nicolao

Sulfur deposits near a fumarole-750px.jpg - S.L.

Monument Geyser-Johnsson1963.jpg - Mike Cline

Grand Canyon of the Yellowstone 4 (8044080291).jpg - File Upload Bot (Magnus Manske)

Sulphur Caldron (27615647381).jpg - Ser Amantio di Nicolao

Steamboat Geyser major eruption - steam phase (9 36 AM-onward, 4 June 2018) 28 (42282583565).jpg - Ser Amantio di Nicolao

Grand Canyon of the Yellowstone River (Yellowstone, Wyoming, USA) 154 (32741052057).jpg - Ser Amantio di Nicolao

Clepsydra Geyser (8 July 2014) 2 (15138646499).jpg - Ser Amantio di Nicolao

Hydrothermally-altered rhyolitic ash-flow tuff (Lava Creek Tuff, Middle Pleistocene, 640 ka) at Steamboat Geyser (6 August 2013) 1 (12729770834).jpg - Ser Amantio di Nicolao

Native sulfur-encrusted vent at Steamboat Geyser (10 August 2011) 1 (12728578625).jpg - Ser Amantio di Nicolao

Dried-out mud volcano (Artists Paintpots East) (5 July 2012) 2 (12640824065).jpg - Ser Amantio di Nicolao

Steamboat Geyser (9 August 2011) 7.jpg - Ser Amantio di Nicolao

Yellowstone National Park (WY, USA), Fountain Geyser -- 2022 -- 2443.jpg - XRay

Yellowstone National Park (WY, USA), Norris Geyser Basin -- 2022 -- 2680.jpg - XRay

Yellowstone N.P. 1997 61.jpg - LBM1948

Avoca Spring (afternoon, 4 June 2016) 3.jpg - Ser Amantio di Nicolao

Native sulfur-encrusted geyserite margin of Cistern Spring (6 August 2013) 3.jpg - Ser Amantio di Nicolao

Black Pit Spring (6 August 2013) 10.jpg - Ser Amantio di Nicolao

Unnamed hydrothermal feature SSW of Ledge Geyser (17 June 2023) 3.jpg - Ser Amantio di Nicolao

Unnamed hydrothermal feature SSW of Ledge Geyser (17 June 2023) 1.jpg - Ser Amantio di Nicolao

Pebble Geyser (afternoon, 11 August 2023).jpg - Ser Amantio di Nicolao