Excelsior Geyser in United States by admin September 19, 2022 Located in Yellowstone’s Midway Geyser Basin, Excelsior Geyser is the largest geyser in the world. The geyser is largely dormant these days. The last major eruptions of the geyser were… Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)