Lewis & Clark Visitor's Center

From website, "Located on top of scenic Calumet Bluff, the Lewis & Clark Visitor Center overlooks the Missouri River and Lewis and Clark Lake. Operated by the U.S. Army Corps of Engineers and the National Park Service, this center offers early history of the Missouri River and Lewis and Clark, a theater, wildlife displays and a view of Gavins Point Dam. Off-season hours include late February through Memorial Day and Labor Day through November, Monday-Friday from 8 a.m. – 4:30 p.m.  Summer hours include Memorial Day through Labor Day, Sunday - Thursday from 8 a.m. - 6 p.m. and Friday - Saturday from 8 a.m. - 7 p.m. "