(Photo: National Park Service)
Valley Forge National Historical Park, Pennsylvania
Just a short drive from Philadelphia, Valley Forge is the site where General Washington and his Continental Army camped during the Revolutionary War. Here, visitors can learn about life in the 18th century as well as explore an expanse of lush parkland, including more than 3,000 acres of grassland, wetland, and deciduous forest, which become awash with rich colors in autumn.
When to Go: Weekly foliage reports are posted on Pennsylvania's official tourism website.