Category: Park/Wilderness/Nature
City: Yellowstone National Park
The major attractions at Midway Basin are the Grand Prismatic Spring and Excelsior Geyser – once the most powerful in the park. It spouted in 1888, then waited more than 100 years before going off again with a 300 foot column of water and steam. It still produces 1.5 billion gallons of scalding water annually and its steam fills the whole basin at sunset when the air begins to cool