The 1,784-acre Marsh Creek State Park sits in north central Chester County, PA, near Downingtown. The focal point of the park is the 535-acre Marsh Creek Lake which offers fishing and boating, as well as 19.5 miles of hiking trails in the surrounding area. Marsh Creek Lake was created by damming Marsh Creek in the early ‘70s and is one of the few lakes in the commonwealth to sit above the remnants of a town beneath the surface. What’s left of Milford Mills (the roads, foundations and the embankments of Larkin’s Bridge) can be found 30 to 50 feet beneath the surface. (The buildings were removed before flooding the area.)…