National Park/Forest Units by Bordering State

Guess each U.S. state (including D.C.) by a hint where every state borders the one before it. Each hint consists of a National Park or Forest within that state. In addition to official National Parks, this includes National Battlefields, Military Parks, Monuments, Historical Parks or Sites, Memorials, Seashores, Lakeshores and Preserves. Last two questions are bonus states not bordering any other.