Aurora borealis, Upper Geyser Basin. Original public domain image from Flickr https://www.rawpixel.com/image/4039503/photo-image-background-green-spaceFree Image from public domain licenseThe Castle Geyser, Upper Geyser Basin, Yellowstone National Park, L. Prang & Co., publisher https://www.rawpixel.com/image/7688967/image-national-park-poster-prang-yellowstoneFree Image from public domain licenseThe Castle Geyser, Upper Geyser Park. Original public domain image from the Smithsonian https://www.rawpixel.com/image/7727323/public-domain-image-from-the-smithsonianFree Image from public domain licenseHeart Spring with a Castle Geyser eruption by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038771/photo-image-nature-mountain-waterFree Image from public domain licenseCastle Geyser late evening eruptionby Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038910/photo-image-summer-nature-mountainFree Image from public domain licenseGrand Geyser erupts behind Castle Geyser by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038926/photo-image-nature-mountain-waterFree Image from public domain licenseCastle Geyser eruption with double rainbow by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038908/photo-image-rainbow-summer-natureFree Image from public domain licenseWinter solstice Castle Geyser eruption with rainbow by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038882/photo-image-rainbow-nature-mountainFree Image from public domain license"Castle Geyser Cove, Yellowstone National Park," Wyoming. Photographer: Adams, Ansel, 1902-1984. Original public domain… https://www.rawpixel.com/image/8802599/photo-image-mountain-nature-waterFree Image from public domain licenseHot Spring and Castle Geyser. Original from the Minneapolis Institute of Art. https://www.rawpixel.com/image/7652910/photo-image-vintage-art-public-domainFree Image from public domain licenseMilky Way and Castle Geyser viewed from the boardwalk over the Firehole River by Jacob W. Frank. Original public domain… https://www.rawpixel.com/image/4038528/photo-image-tree-plant-personFree Image from public domain licenseWinter solstice Castle Geyser eruption by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038494/photo-image-nature-mountain-waterFree Image from public domain licenseCastle Geyser pre-eruption by Diane Renkin. Original public domain image from Flickr https://www.rawpixel.com/image/4038285/photo-image-nature-mountain-waterFree Image from public domain licenseDistant View of the Castle Geyser by William Henry Jackson https://www.rawpixel.com/image/14281362/distant-view-the-castle-geyser-william-henry-jacksonFree Image from public domain licenseYellowstone National Park, Eruption of the Castle. by Benjamin West Kilburn https://www.rawpixel.com/image/14296197/yellowstone-national-park-eruption-the-castle-benjamin-west-kilburnFree Image from public domain licenseCrater of Castle Geyser, Fire Hole Basin. by William Henry Jackson https://www.rawpixel.com/image/14293181/crater-castle-geyser-fire-hole-basin-william-henry-jacksonFree Image from public domain license