Midway Geyser Basin is much smaller than the other basins found alongside the Firehole River in Yellowstone National Park. Despite its small size, it contains two large features, the 200-by-300-foot-wide Excelsior Geyser which pours over 4,000 U.S. gallons per minute into the Firehole River. The largest hot spring in Yellowstone, the 370-foot-wide and 121-foot-deep Grand Prismatic Spring is also found there. Wikipedia
The Old Faithful Visitor Education Center features exhibits on Yellowstone's hydrothermal features (geysers, hot springs, mudpots, and fumaroles), life in these extreme environments, the volcano beneath Yellowstone, and ongoing scientific research in one of the greatest living laboratories on earth. Children of all ages will enjoy the Young Scientist exhibit room, which includes a geyser model, hands-on exhibits, and a gathering space for classes and other organized groups. Evening ranger-led programs are presented during the summer and the winter seasons. The Old Faithful Visitor Education Center was built to minimize its impact on the natural surroundings and is a LEED certified building. Located across the west parking lot are a combination ranger station, backcountry office, and clinic. This facility also houses the office of the district naturalist and the district library. NPS
