Shower Curtain: grand prismatic spring, yellowstone, thermal feature, wyoming, water feature, thermal, water, yellowstone national park, tourist attraction, scenery, thermal features, landscape, steam, hot water, hot pool, thermophiles, turquoise, blue, nature, volcanic, natural, thermal springs, vacation, minerals, pool, colors, deposits, hike, spring, colorful, vivid, color, vibrant, unusual, beautiful