Charleston Falls Preserve is the most visited nature park in Miami County with over 216 acres of prairie and forests. The most unusual feature of this preserve is the waterfall. Originating from small underground springs several miles to the east, the stream creating the falls plummets 37' on its journey to the Great Miami River, one mile to the west. Flowing over rock strata that are also found in New York State and Canada, the falls can rightly be called a “Miniature Niagara.”