It's popularly believed that my home state of Kansas is flat. OK, it's not just a popular belief: It's a proven fact that Kansas is flatter than a pancake. Nonetheless, the western edge of the state is actually higher than the average peak in the Appalachian Mountains.
In 1998, five men climbed to the summit of Mt. Sunflower, the highest point in Kansas at over 4,000 feet. Read Into Thick Air, the story of this historic ascent.