Running 184 miles from Washington, D.C., to Cumberland, Maryland, the Chesapeake & Ohio Canal National Historical Park offers as much adventure as you can handle. Hiking and biking on the towpath is a favorite activity for locals and visitors alike. With so much history and nature to experience, you should #OptOutside this week to enjoy the fall colors. Photo by Kathi Isserman (http://ift.tt/18oFfjl).