The Delaware River is a major river in the Mid-Atlantic region of the United States and is the longest free-flowing (undammed) river in the Eastern United States. From the meeting of its branches in Hancock, New York, the river flows for 282 miles (454 km) along the borders of New York, Pennsylvania, New Jersey, and Delaware, before emptying into Delaware Bay.
The Mason–Dixon line, also called the Mason and Dixon line or Mason's and Dixon's line, is a demarcation line separating four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia. It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon as part of the resolution of a border dispute involving Maryland, Pennsylvania, and Delaware in the colonial United States. The dispute had its origins almost a century earlier in the somewhat confusing proprietary grants by King Charles I to Lord Baltimore (Maryland), and by his son King Charles II to William Penn.
Port Jervis is a city located at the confluence of the Neversink and Delaware rivers in western Orange County, New York, United States, north of the Delaware Water Gap. Its population was 8,775 at the 2020 census. The communities of Deerpark, Huguenot, Sparrowbush, and Greenville are adjacent to Port Jervis. Matamoras, Pennsylvania, is across the river and connected by the Mid-Delaware Bridge. Montague Township, New Jersey, also borders the city. The Tri-States Monument, marking the tripoint between New York, New Jersey, and Pennsylvania, lies at the southwestern corner of the city.
Matamoras is a borough in Pike County, Pennsylvania, United States. The population was 2,362 at the 2020 census. It is the easternmost municipality of any kind in Pennsylvania. Matamoras is part of the New York–Newark–Jersey City, NY–NJ–PA Metropolitan Statistical Area, as well as the larger New York–Newark, NY–NJ–CT–PA Combined Statistical Area.
The Ramapo River is a tributary of the Pompton River, approximately 30 mi (48 km) long, in southern New York and northern New Jersey in the United States.
The Neversink River is a 55-mile-long (89 km) tributary of the Delaware River in southeastern New York in the United States. The name of the river comes from the corruption of an Algonquian language phrase meaning "mad river."
The 41st parallel north is a circle of latitude that is 41 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.
The Wedge is a 1.068-square-mile tract of land along the borders of Delaware, Maryland and Pennsylvania. Ownership of the land was disputed until 1921; it is now recognized as part of Delaware. The tract was created primarily by the shortcomings of contemporary surveying techniques when the boundaries were defined in the 18th century. It is bounded on the north by an eastern extension of the east–west portion of the Mason–Dixon line, on the west by the north–south portion of the Mason–Dixon line, and on the southeast by the Twelve-Mile Circle around New Castle, Delaware. The crossroads community of Mechanicsville, Delaware, lies within the area today.
The Twelve-Mile Circle is an approximately circular arc that forms most of the boundary between Delaware and Pennsylvania. It is a combination of different circular arcs that have been feathered together.
A triple border, tripoint, trijunction, triple point, or tri-border area is a geographical point at which the boundaries of three countries or subnational entities meet. There are 175 international tripoints as of 2020. Nearly half are situated in rivers, lakes or seas. On dry land, the exact tripoints may be indicated by markers or pillars, and occasionally by larger monuments.
Tri-state area is an informal term in the United States which can refer to any of multiple areas that lie across three states. When referring to populated areas, the term implies a shared economy or culture among the area's residents, typically concentrated around a central metropolis.
The Line of Property is the name commonly given to the line dividing Indian lands from those of the Thirteen Colonies, which were established in the 1768 Treaty of Fort Stanwix between British officials and the Iroquois tribes. In western Pennsylvania, it is referred to as the Purchase line.
The New York–Pennsylvania border is the state line between the U.S. states of New York and Pennsylvania. It has three sections:
The northern boundary of the U.S. state of Massachusetts adjoins two other states: Vermont and New Hampshire. The majority of the boundary is roughly a straight line from the northwest corner of the state east to a point in Dracut, just north of Lowell. East of that point, the border is a series of line segments about 3 miles (5 km) north of the curving Merrimack River, ending in the Atlantic Ocean.
The New York – New Jersey Line War was a series of skirmishes and raids that took place for over half a century between 1701 and 1765 at the disputed border between two American colonies, the Province of New York and the Province of New Jersey.
The Minisink or Minisink Valley is a loosely defined geographic region of the Upper Delaware River valley in northwestern New Jersey, northeastern Pennsylvania and New York.
Carpenter's Point is a historical hamlet in the town of Deerpark, Orange County, New York, United States, first settled circa 1690. It is located at the mouth of the Neversink River at its juncture with the Delaware River, near the point where the state lines of New Jersey, New York and Pennsylvania meet at the Tri-States Monument. It is named after the Carpenter family, who lived on the southeastern side of the Neversink, extending into New Jersey. Benjamin Carpenter operated a ferry across the Delaware here.
The Penn–Calvert boundary dispute was a long-running legal conflict between William Penn and his heirs on one side, and Charles Calvert, 3rd Baron Baltimore and his heirs on the other side. The overlapping nature of their charters of land in Colonial America required numerous attempts at mediation, surveying, and intervention by the king and courts of England to ultimately be resolved. Subsequent questions over these charters have also been adjudicated by American arbitrators and the Supreme Court of the United States. The boundary dispute shaped the eventual borders of five U.S. states: Pennsylvania, Maryland, Delaware, New Jersey, and West Virginia.
The North Carolina–Tennessee–Virginia Corners is a tripoint at which North Carolina, Tennessee and Virginia meet. The landmark is located in the Iron Mountains, and is roughly 16 miles north of Snake Mountain, and 8 miles southwest of Mount Rogers.
