.) Gardner Cave: Located 11 miles north of Metaline, WA, you have to descend 90-feet into the cave. Guided tours are offered May through mid September. 2.) Lenore Lake Caves: Located in Grand Coulee, WA, with more than 12,000 years of history there is so much to discover in these shallow caves that Native Americans once used for shelter. 3.) Running Eagle Falls in Glacier Nat'l Park: Checkout the waterfall that emerges from a cave.