Question: Cumberland Gap, Tennessee is surrounded on all sides by a park named after a natural break in what mountains?
Context: The June 1862 capture of the Cumberland Gap was a Union victory during the American Civil War leading to Union occupation of the Cumberland Gap for three months. Battle of the Cumberland Gap may refer to several engagements in and around the Cumberland Gap during the American Civil War. The Rocky Face Fault is a geological fault responsible, in part, for the location of Cumberland Gap at Cumberland Mountain and the Narrows gap at Pine Mountain in the southern Appalachian mountain range.  The fact that these two gaps lined up enabled western migration across the Appalachians to Kentucky.  Included along the fault are the towns of Middlesboro and Pineville, Kentucky.  The fault represents a crack in the Cumberland Overthrust Sheet, one of many remnant resistant strata pushed upwards to the northwest over the neighboring Cumberland Plateau.  The fault is named after Rocky Face, a prominent, cliff-lined mountain between Middlesboro and Pineville, Kentucky. The September 7–9, 1863 fall of the Cumberland Gap was a victory for Union forces under the command of Ambrose Burnside during his campaign for Knoxville.  The bloodless engagement cost the Confederates 2,300 men and control of the Cumberland Gap. The Justin P. Wilson Cumberland Trail State Park is a Tennessee hiking trail following a line of ridges and gorges along the eastern escarpment of the Cumberland Plateau in Tennessee.  The trail begins at Cumberland Gap National Historical Park and ends at Chickamauga and Chattanooga National Military Park and Prentice Cooper Wildlife Management Area just outside Chattanooga, Tennessee.  The trail travels through 11 Tennessee counties and two time zones. "Cumberland Gap" is an Appalachian folk song that likely dates to the latter half of the 19th century and was first recorded in 1924.  The song is typically played on banjo or fiddle, and well-known versions of the song include instrumental versions as well as versions with lyrics.  A version of the song appeared in the 1934 book, "American Ballads and Folk Songs", by folk song collector John Lomax.  Woody Guthrie recorded a version of the song at his Folkways sessions in the mid-1940s, and the song saw a resurgence in popularity with the rise of bluegrass and the American folk music revival in the 1950s.  In 1957, the British musician Lonnie Donegan had a No. 1 UK hit with a skiffle version of "Cumberland Gap". The Fincastle Turnpike, also known as the "Fincastle and Blue Ridge Turnpike Company", was approved in 1834 by the Virginia General Assembly to maintain a toll turnpike that followed part of the Wilderness Road from Fincastle, Virginia, to the Cumberland Gap.  The Fincastle Turnpike also connected Narrows, Virginia and Tazewell, Virginia along the way to the Cumberland Gap, following roughly what is today parts of Virginia State Route 42 and Virginia State Route 61. Established on June 11, 1940, Cumberland Gap National Historical Park is a United States National Historical Park located at the border between Kentucky, Tennessee, and Virginia.  The Cumberland Gap is a sizable natural break in the Appalachian Mountains. Cumberland Gap is a town in Claiborne County, Tennessee, United States.  Its population was 494 at the 2010 census.  The town is located near the Cumberland Gap, a historic mountain pass for which the town is named, and is surrounded on all sides by the Cumberland Gap National Historical Park.  The town is also a part of the park. The Cumberland Gap Tunnel is a tunnel that carries U.S. Route 25E under Cumberland Gap National Historical Park near the intersection of Kentucky, Tennessee, and Virginia.  According to United States Geological Survey maps of the area, the tunnel does not enter Virginia.  It is one of only two mountain vehicular tunnels in the United States that cross a state line, the other being the East River Mountain Tunnel on Interstate 77 between Virginia and West Virginia.
Answer: Appalachian Mountains