Harpers Ferry National Park. If you’re a US history enthusiast, Harpers Ferry is the place to see. Or, even if you just have a mild interest in the historical significance, there is so much more to experience. Harpers Ferry is the site of the confluence of the Potomac and Shenandoah Rivers. Maryland, Virginia and West Virginia all meet at Harpers Ferry. Four national parks and three national trails all convene at Harpers Ferry. And, it is the halfway point on the Appalachian Trail.