From the west side of Monument Geyser Basin in Yellowstone National Park, this video shows some of the hot springs, steam vents and geyser cones, of which the largest and most active is 8 foot tall Monument Geyser. The basin is reached by a steep, one mile trail starting at the north end of Gibbon Canyon, along the main road between Norris and Madison. (mp4; 2:01 min; 17 mb)