19 remote islands and the tallest Atlantic Coastline rocky cliffs are protected by Acadia National Park in Maine.
One of the oldest rivers on the continent, the New River, has created a deep valley through the Appalachian Mountains with challenging whitewater currents.
This park protects the greatest old-growth floodplain forest in North America and the tallest trees in the east along the Congaree River in South Carolina.
The Olympic Peninsula's enormous wildness and three ecosystems make Washington's Olympic National Park one of the nation's most diversified.
Arizona's Grand Canyon National Park is 3.5 hours from Phoenix and 4.5 from Las Vegas.
In just over an hour, Shenandoah takes you from DC to Virginia's Blue Ridge Mountains, part of the Appalachian Range.
Natural hot springs in Garland County, Arkansas, have drawn health-conscious visitors for decades.