Summer Drives and Viewpoints. Summer Drives and Viewpoints - Sequoia & Kings Canyon National Parks (U.S. National Park Service) Drive carefully along this section of the road blasted out of the nearly sheer walls of Kings Canyon. Stop frequently to appreciate the grandeur of this water-carved canyon. A marble cave here is open for tours in summer. Nearby, notice the layers of marble sandwiched between strips of volcanic rock. Tremendous forces tipped these layers to a nearly vertical orientation.
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