Question: The Ridge-and-Valley Appalachians form a broad arc between the Blue Ridge Mountains, which is located where?
Context: The Blue Ridge Music Center is a music venue, museum, and visitor center located at milepost 213 on the Blue Ridge Parkway near Galax, Virginia.  The center celebrates the music and musicians of the Blue Ridge Mountains through concerts, exhibits, and programs that highlight living musical heritage of the Blue Ridge region and interpret its significance within the larger landscape of American music and culture.  The site is operated through a partnership between the National Park Service and Blue Ridge Parkway Foundation.  The Music Center operates May through October.  Free Midday Mountain Music acoustic sessions featuring local musicians are offered from noon to 4 p.m. daily.  Concerts are offered most Saturdays during the season and include old-time, bluegrass, folk, Americana, gospel, and country blues performances.  The Roots of American Music Museum on site showcases the region's rich musical heritage.  Admission to the museum is free. The Blue Ridge Mountains are a physiographic province of the larger Appalachian Mountains range.  This province consists of northern and southern physiographic regions, which divide near the Roanoke River gap.  The mountain range is located in the eastern United States, starting at its southernmost portion in Georgia, then ending northward in Pennsylvania.  To the west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley, bordered on the west by the Ridge and Valley province of the Appalachian range. The Blue Ridge Tunnel (also known as the Crozet Tunnel) is a historic railroad tunnel built during the construction of the Blue Ridge Railroad in the 1850s.  The tunnel was the westernmost and longest of four tunnels engineered by Claudius Crozet to cross the Blue Ridge Mountains at Rockfish Gap in central Virginia.  At 4237 ft in length, the tunnel was the longest tunnel in the United States at the time of its completion in 1858.  The tunnel was used by the Virginia Central Railroad from its opening to 1868, when the line was reorganized as the Chesapeake and Ohio Railroad (renamed Chesapeake and Ohio Railway in 1878).  The Chesapeake and Ohio routed trains through the tunnel until it was abandoned and replaced by a new tunnel in 1944.  The new tunnel was named the "Blue Ridge Tunnel" as well, although the original tunnel still remains abandoned nearby.  The old Blue Ridge Tunnel has since been named a Historic Civil Engineering Landmark. The geography of Georgia describes a state in the Southeastern United States in North America.  The Golden Isles of Georgia lie off the coast of the state.  The main geographical features include mountains such as the Ridge-and-valley Appalachians in the northwest, the Blue Ridge Mountains in the northeast, the Piedmont plateau in the central portion of the state and Coastal Plain in the south.  The highest area in Georgia is Brasstown Bald which is 1,458 m (4,784 ft) above sea level, while the lowest is at sea level, at the Atlantic Ocean.  Georgia is located at approximately 33° N 83.5° W.  The state has a total area of 154077 km2 and the geographic center is located in Twiggs County . USS "Blue Ridge" (LCC-19) is the lead ship of the two "Blue Ridge"–class command ships of the United States Navy, and is the command ship of the United States Seventh Fleet.  Her primary role is to provide command, control, communications, computers, and intelligence (C4I) support to the commander and staff of the United States Seventh Fleet.  She is currently forward-deployed to U.S. Navy Fleet Activities, Yokosuka in Japan, and is the third Navy ship named after the Blue Ridge Mountains, a range of mountains in the Appalachian Mountains of the eastern United States.  "Blue Ridge" is the oldest deployable warship of the U.S. Navy, following the decommissioning of  in Pearl Harbor on 14 August 2014.  "Blue Ridge", now the U.S. Navy's active commissioned ship having the longest total period as active, flies the First Navy Jack.  "Blue Ridge" is expected to remain in service until 2039. The Appalachian-Blue Ridge forests is an ecoregion in the Temperate broadleaf and mixed forests Biome, in the Eastern United States.  The ecoregion is located in the central and southern Appalachian Mountains, including the Ridge-and-Valley Appalachians and the Blue Ridge Mountains.  It covers an area of about 61500 sqmi in: northeast Alabama and Georgia, eastern Tennessee, western North Carolina, Virginia, Maryland, and central West Virginia and Pennsylvania; and small extensions into Kentucky, New Jersey, and New York. The Shenandoah Valley is a geographic valley and cultural region of western Virginia and the Eastern Panhandle of West Virginia in the United States.  The valley is bounded to the east by the Blue Ridge Mountains, to the west by the eastern front of the Ridge-and-Valley Appalachians (excluding Massanutten Mountain), to the north by the Potomac River and to the south by the James River.  The cultural region covers a larger area that includes all of the valley plus the Virginia highlands to the west, and the Roanoke Valley to the south.  It is physiographically located within the Ridge and Valley province and is a portion of the Great Appalachian Valley. The Ridge-and-Valley Appalachians, also called the Ridge and Valley Province or the Valley and Ridge Appalachians, are a physiographic province of the larger Appalachian division and are also a belt within the Appalachian Mountains extending from southeastern New York through northwestern New Jersey, westward into Pennsylvania and southward into Maryland, West Virginia, Virginia, Kentucky, Tennessee, Georgia and Alabama.  They form a broad arc between the Blue Ridge Mountains and the Appalachian Plateau physiographic province (the Allegheny and Cumberland Plateaus).  They are characterized by long, even ridges, with long, continuous valleys in between. The Blue Ridge Mountains Council is a Boy Scouts of America council located in Roanoke, Virginia that serves Scouts in southwest and south central Virginia.  The Blue Ridge Mountains Council owns and operates the Blue Ridge Scout Reservation in Pulaski County, Virginia.  The local Order of the Arrow lodge is the Tutelo Lodge. Plantations that operated within the present-day boundaries of West Virginia were located in the counties of the Ridge-and-Valley Appalachians and in the Kanawha and Ohio River valley regions.  Beginning in the mid-to-late 18th century, members of the Washington family and other prominent Virginia families began to build elegant Georgian mansions on their plantations in the Ridge-and-Valley Appalachians region of present-day West Virginia.  Plantations initially developed in the counties lying within the Northern Neck Proprietary of Thomas Fairfax, 6th Lord Fairfax of Cameron within the Shenandoah Valley and South Branch Potomac River valleys.  Slavery as practiced through plantations in the American South was carried over from the plantations of the Piedmont and Tidewater regions of Virginia, where plantations had become the foundation of society and industry.  Following the French and Indian War, settlement and agricultural development continued unabated in the Shenandoah and South Branch Potomac valleys.  Early instances of western Virginia plantations with grand homes include the John Ariss-designed Harewood (1774) for George Washington's brother Samuel Washington and Happy Retreat (1780) built by Washington's younger brother Charles Washington, both of which are located near Charles Town in present-day Jefferson County.  In Hampshire County, Nicholas Casey constructed a Georgian mansion (1774) at his Wappocomo plantation, one of the first plantation houses of its kind in the South Branch Potomac River valley.
Answer: the eastern United States, starting at its southernmost portion in Georgia, then ending northward in Pennsylvania