Mark Twain Memorial Bridge (1936) Mark Twain Memorial Bridge (1936) The Mark Twain Memorial Bridge was a Cantilevered Through Truss Bridge carrying US 36 over the Mississippi River. It was replaced in 2000 with the extension of I-72 and subsequently demolished. The bridge, which replaced motor vehicle use of the Wabash Bridge, was opened in 1936 by President Franklin D. Roosevelt and entered Missouri at the foot of Cardiff Hill which appeared in Twain's books The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn. A crosswalk crossed the highway, connecting the Twain boyhood home with the lighthouse at the top of the hill.
Mark Twain National Forest forests. Its headquarters are in Rolla, Missouri. Some unique features of the Mark Twain include Greer Spring, which is the largest spring on National Forest land and part of the Eleven Point National Scenic River, and pumps an average of 214 million gallons of water per day into the river. The public can also visit the Glade Top Trail National Scenic Byway, which offers views of over to the Boston Mountains in Arkansas. The 350-mile Ozark Trail system winds through much of the National Forest. The Mark Twain National Forest, as we know it today, was created on February 17,