[Illustration: JOHN OTTO’S MONUMENT, at southwest corner of the Historical Museum and Institute of Western Colorado, at northeast corner of Fourth Street and Ute Avenue, Grand Junction. View looking north. Face is 4 feet square. (Fig. 2)] Otto’s rock is at the southwest corner of The Historical Museum and Institute of Western Colorado. The main attraction inside is a life-size skeleton of _Allosaurus_ (fig. 23), whose bones are exact plastic replicas of real ones at the museum of Brigham Young University, at Provo, Utah. The painstaking casting of the “bones” and assembly of the self-supporting skeleton was done by Al T. Look, son of author Al Look listed under “References.” The museum also houses other items of interest from the Grand Junction area. Construction of the scenic Rim Rock Drive through the Monument was begun by the National Park Service about 1931 using workers from the Civilian Conservation Corps, and the drive eventually was completed to join roads from Fruita and Grand Junction. The route from Fruita includes a winding road up Fruita Canyon and through two tunnels to the mesa (figs. 3, 44, 45). A modern Visitor Center, new housing facilities for park personnel, additions to the campgrounds, the Devils Kitchen Picnic Area near the East Entrance, several self-guiding nature trails, and additional overlooks and roadside exhibits were completed in 1964 as part of the Mission 66 program of the National Park Service. The Monument originally included 13,749 acres, but boundary changes in 1933 and 1939 increased the total to 17,660 acres, and the inclusion of all of No Thoroughfare Canyon and other boundary adjustments in 1978 increased the size to about 20,457 acres, or about 32 square miles (see map, fig. 3). Early History of the Region Prehistoric People John Otto, early explorers, and even the Ute Indians who once hunted in the area were by no means the first people to view the Monument, in fact they were “Johnnies-come-lately.” Considerable evidence indicates that prehistoric people inhabited the area thousands of years ago. [Illustration: MAP OF COLORADO NATIONAL MONUMENT, showing location in Colorado, boundaries, streams, highways and roads, principal trails, named features, overlooks, and—in triangles—trip guides localities. The trip guides numbers correspond to the numbers in the right margins of the section entitled “Trips through and around the Monument.” Visitors are given pamphlets at the two entrance stations and may purchase other reports and maps at the Visitor Center. (Fig. 3)]