Dry Falls Interpretive Center, Washington

This interpretive center is located at a point overlooking the Dry Falls site, one of the most dramatic formations of the Great Spokane Flood, a series of massive flooding events that shaped the landscape of much of eastern Washington around 15,000 years ago. During the largest floods, perhaps lasting only a few weeks, the cliffs below the interpretive center were a waterfall 400 feet tall and three miles across, with a volume of water that was ten times that of the combined flow of all the rivers on Earth.