Question: Germantown is along what policital barrier?

Context paragraphs:
The Highlands, Louisville: The Highlands is an area in Louisville, Kentucky which contains a high density of nightclubs, eclectic businesses, and many upscale and fast food restaurants.  It is centered along a three-mile stretch of Bardstown Road and Baxter Avenue (US 31E/US 150) and is so named because it sits atop a ridge between the middle and south forks of Beargrass Creek.  The commercial area extends from the intersection of Bardstown Road and Taylorsville Road/Trevillian Way in the south, to the intersection of Baxter Avenue and Lexington Road in the north, a length of 3.2 miles.  A 1/2 mile section of nearby Barret Avenue also contains many similar businesses.  The residential area is separated from other adjacent areas like Germantown and Crescent Hill by the south and north forks of Beargrass Creek.  The middle fork runs through Cherokee Park, and the south fork divides Germantown from Tyler Park, after flowing past several cemeteries and undeveloped forests downstream from Joe Creason Park.  Due to its large collection of night clubs and restaurants, it is locally known as "Restaurant Row."

Upper Burial Ground: The Upper Burial Ground is a cemetery in the Germantown section of Philadelphia, Pennsylvania.  It is notable as the last resting place of 58 American soldiers from the Battle of Germantown in the American Revolution.  Here also lies many of the founders of Germantown, including William Dewees, sheriff of Germantown's independent government.  Also buried here is Zachariah Poulson, who died in 1844 after having published The American Daily Advertiser, Philadelphia's principal daily newspaper for many years.  Another significant grave is that of Alexander Mack, the founder of the Schwarzenau Brethren (or German Baptist Brethren).  Originally buried in Axe's Burial Ground in 1735, his remains were carefully removed in 1894 along with his field stone to the God's Acre in the rear of the Brethren church, where they now repose beside those of his son, Alexander, and family.

Florida Reef: The Florida Reef (also known as the Great Florida Reef, Florida reefs, Florida Reef Tract and Florida Keys Reef Tract) is the only living coral barrier reef in the continental United States.  It is the third largest coral barrier reef system in the world (after the Great Barrier Reef and Belize Barrier Reef).  It lies a few miles seaward of the Florida Keys, is about 4 miles (6 to 7 km) wide and extends (along the 20 meter depth contour) 270 km from Fowey Rocks just east of Soldier Key to just south of the Marquesas Keys.  The barrier reef tract forms a great arc, concentric with the Florida Keys, with the northern end, in Biscayne National Park, oriented north-south and the western end, south of the Marquesas Keys, oriented east-west.  The rest of the reef outside Biscayne National Park lies within John Pennekamp Coral Reef State Park and the Florida Keys National Marine Sanctuary.  Isolated coral patch reefs occur northward from Biscayne National Park as far as Stuart, in Martin County.  Coral reefs are also found in Dry Tortugas National Park west of the Marquesas Keys.  There are more than 6,000 individual reefs in the system.  The reefs are 5,000 to 7,000 years old, having developed since sea levels rose following the Wisconsinan glaciation.

Israeli West Bank barrier: The Israeli West Bank barrier or wall (for further names see here) is a separation barrier in the West Bank or along the Green Line.  Israel considers it a security barrier against terrorism, while Palestinians call it a racial segregation or apartheid wall.  At a total length of 708 km upon completion, the border traced by the barrier is more than double the length of the Green Line, with 15% running along it or in Israel, while the remaining 85% cuts at times 18 km deep into the West Bank, isolating about 9.4% of it, leaving an estimated 25,000 Palestinians isolated from the bulk of that territory.

Germantown Redoubt: The Germantown Redoubt (more commonly known as Fort Germantown) is a redoubt built during the Civil War by Union troops.  This was built along a relatively sharp bend of the Memphis and Charleston Railroad (now the Memphis Subdivision of the Norfolk Southern Railway).  It is located a couple miles east of the Old Germantown neighborhood in Germantown, Tennessee.  Federal troops built the garrison after they took control of Corinth, Mississippi (about 90 miles east of Memphis) and the railroad.  From an archaeological standpoint, it is significant in that it is one of the few intact defense structures found of its size.  This has given historians a perspective on how these forts were constructed and artifacts found there have given a hint about the daily life at the fort.

Outer barrier: The outer barrier, also known as the Long Island and New York City barrier islands, refers to the string of barrier islands that divide the lagoons south of Long Island, New York from the Atlantic Ocean.  These islands include Coney Island, Long Beach Barrier Island, Island Park, Jones Beach Island, Fire Island and Westhampton Island.  The outer barrier extends 75 mi along the South Shore of Long Island, from Rockaway Beach on the New York City/Nassau County border from Long Beach Barrier Islands' western edge, to Suffolk County's east end of Shinnecock Bay.

Germantown (town), New York: Germantown is a town in Columbia County, New York, United States.  The population was 1,954 at the 2010 census.  Germantown is located in the southwest part of the county, along the east side of the Hudson River.

History of rail transport in Philadelphia: Philadelphia was an early railroad hub, with lines from all over meeting in Philadelphia.  The first railroad in Philadelphia was the Philadelphia, Germantown and Norristown Railroad, opened in 1832 north to Germantown.  At the end of 1833, the state-built Philadelphia and Columbia Railroad, part of the Main Line of Public Works, opened for travel to the west, built to avoid loss of travel through Pennsylvania due to projects such as the Erie Canal.  At the same time, the north-south leg of the Philadelphia City Railroad opened, running south along Broad Street from the Philadelphia and Columbia.

Colonial Germantown Historic District: The Colonial Germantown Historic District is a designated National Historic Landmark District in the Germantown and Mount Airy neighborhoods of Philadelphia, Pennsylvania along both sides of Germantown Avenue.  This road followed an Indian path from the Delaware River just north of Old City Philadelphia, through Germantown, about 6 miles northwest of Center City Philadelphia, and on to Pottstown.  Settlement in the Germantown area began, at the invitation of William Penn, in 1683 by Nederlanders and Germans under the leadership of Francis Daniel Pastorius fleeing religious persecution.

Hudson River: The Hudson River is a 315 mi river that flows from north to south primarily through eastern New York in the United States.  The river originates in the Adirondack Mountains of Upstate New York, flows through the Hudson Valley, and eventually drains into the Atlantic Ocean, between New York City and Jersey City.  The river serves as a political boundary between the states of New Jersey and New York, and further north between New York counties.  The lower half of the river is a tidal estuary occupying the Hudson Fjord, an inlet which formed during the most recent period of North American glaciation, estimated at 26,000 to 13,300 years ago.  Tidal waters influence the Hudson's flow from as far north as Troy.

Supporting paragraphs: Germantown (town), New York Hudson River
Answer: Hudson River