Central Oregon is dominated by three huge National Parks: Deschutes and Ochoco National Forests plus Crooked River National Grassland. Deschutes National Forest protects a region on the east flank of the Cascade Range and on the large shield shaped volcano, Newberry. The area is of volcanic origin, geologically young and rather complex. There is a great variety of volcanic and glacial landforms. Large strato or composite volcanoes and hundreds of cinder cones dot the landscape. Many lava flows contain lava tubes, several of them are open to the public and even a little developed.