In September of 1935 construction began on the Blue Ridge Parkway linking Virginia's Shenandoah National Park to the Great Smoky Mountains National Park in North Carolina. Portions of this scenic highway were completed over the course of 52 years until the final section was opened around the slopes of Grandfather Mountain in September of 1987. Along its 470-mile route, the Blue Ridge Parkway traverses six mountain ranges of the great Appalachian chain, enters four national forests, provides access to three wilderness areas, crosses six major rivers and passes through five ecological zones. An internationally recognized design achievement, this unparalleled roadway showcases the best of the Blue Ridge in a unique, linear park setting, weaving significant rural and cultural elements of the Southern Applachians with magnificent mountain scenery. From Ed Mabry's grist mill to the sheer granite cliffs of Looking Glass Rock, the Parkway encompasses some of this country's greatest historical and natural treasures. Over 20 million annual visitors enjoy the Blue Ridge Parkway, making it the most visited unit in the National Parkway System and America's favorite journey.