Nice day for a hike, so off I went to Charlestown State Park in Indiana.  The park is part of the land given to the state by the federal government after it closed and cleaned up (at great expense) the Indian Army Ammunitions Plant spread out over more than 10,000 acres along the Ohio River.  Besides the park, there are giant buildings spread out in an industrial park, but skeletons of some of the old ammo buildings remain. See