Corn Palace Mitchell, S.D. It's almost beside the point that the Corn Palace is actually a multipurpose arena. The draw here is the circa 1921 fantasy architecture straight out of The Arabian Nights that's adorned with huge murals made from 275,000-plus ears of multicolored corn. It's "corny" in both senses of the word.
Old Post Office Tower Washington, D.C.: Donald and Ivanka Trump plan to redevelop this landmark, but they can't touch the bell tower, which is run by the National Park Service. While the Washington Monument is closed for repairs due to the 2011 earthquake, the Old Post Office boasts D.C.'s best view.