//
Photo: via Wikimedia Commons, Attribution
These caves on the Grand Coulee were formed by water erosion on volcanic rock, which makes them geologically interesting. The site is a far-flung extension of Sun Lakes-Dry Falls State Park.
Lake Lenore Caves State Park is a Washington State Park in the Lenore Canyon extending into the hills from the shore of Lake Lenore. It is part of the Ice Age Floods National Geologic Trail. Lake Lenore and the rock shelter "caves" were caused by basalt coulee cliffs underscoured by the Missoula floods, the same floods that created the Channeled Scablands.
© OpenStreetMap contributors
At the foot of Dry Falls. Offers camping and lakefront shoreline. During the last ice age, Dry Falls occasionally carried more water by volume than all the rivers of the world combined (known as the Missoula Flood).
A 27 mi reservoir in the northern portion of the Grand Coulee, a formerly dry coulee near the Columbia River, formed by the Missoula Floods.