Among the range's significant features he describes are Mount Stuart, the second highest non-volcanic peak in Washington and one of the largest single granitic mountains in the United States, the Cashmere Crags, the Lost World Plateau, Edward Plateau, and Dragontail Plateau, the Enchantment Lakes Basin ("one of the most marvelous examples of an ice-sculpted wilderness in the Cascade Range″), Icicle Creek and its narrow, U-shaped valley over 6000 feet deep, one of the deepest in the Cascades, and the Wenatchee River's unusual winding Tumwater Canyon gorge.