Sulphur deposits in a piece of lava rock on the slopes of Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Steaming fumarole with sulphur deposits in Tompaluan active crater by Mount Lokon volcano near Tomohon city, Gunung Lokon, Tomohon, North Sulawesi, Indonesia, Southeast Asia, Asia

Sulphur deposits at 'Bumpass Hell', the largest area of mudpots and steam vents at this national park around Lassen Peak volcano, Lassen volcanic national park, California, Usa

Sulphur deposits at 'Bumpass Hell', the largest area of mudpots and steam vents at this national park around Lassen Peak volcano, Lassen volcanic national park, California, Usa

Sulphur deposits at 'Bumpass Hell', the largest area of mudpots and steam vents at this national park around Lassen Peak volcano, Lassen volcanic national park, California, Usa

Mineral field, iron deposits, Brennisteinsalda volcano with the Laugahraun lava field, rhyolite mountains, Landmannalaugar, Fjallabak Nature Reserve, Highlands, Iceland, Europe

Geothermal area with sulphur deposits and acidic salt lakes, Dallol, Danakil Valley, Ethiopia, Africa

Geothermal area, salt crystals with sulphur deposits, Dallol, Danakil valley, Ethiopia, Africa

Geothermal area with sulphur deposits and acidic salt lakes, Dallol, Danakil Valley, Ethiopia, Africa

Boardwalk over steaming ground, mineral deposits, Seltun geothermal area, Krysuvik volcanic system, Reykjanesfolkvangur conservation area, Iceland, Europe

Aerial view, volcanic crater with colourful sulphur deposits, near Frioland ao Fjallabaki, Iceland, Europe

Panoramic view of the turquoise-green waters of Venere's Mirror a thermal lake formed in an extinct volcanic crater on Pantelleria Island, Sicily, Italy

Acidic pools, mineral formations, salt deposits in the crater of Dallol Volcano, Danakil Depression, Afar Region, Ethiopia

Acidic pools, mineral formations, salt deposits in the crater of Dallol Volcano, Danakil Depression, Afar Region, Ethiopia

boat embedded in deposits of lahar Chaiten South Chile Chile South America America Chile South America America