The scenery along the Columbia and the Palouse rivers provides views unknown in the East. Eons ago a cataclysmic flood equaling the contents of Lake Ontario and Lake Erie broke through surrounding land barriers during a single 48-hour period, fundamentally reconfiguring the downstream landscape. It created deep deposits of fertile topsoil forming the basis of today’s agriculture. Subsequent smaller-scale floods created undulating hills, gorges, and terraced configurations. Earlier volcanic formations were exposed leaving striated basalt formations. Waterfalls abound as streams and rivers make their way downstream.