Channel Islands National Park - One of America's Least Visited National Parks. Considered by some to be the Northern Galipagos.
Chesapeake and Ohio Canal - a 180 mile long park which runs along the Maryland side of the Potomac River between Washington, DC and Cumberland, Maryland. It's open to hikers, bicyclists as well as horses.
Montana Wilderness and Bitterroot NFS - Internet service provider dedicated to preserving the nations forest and wilderness through education and respect.