Delaware–Maryland–Pennsylvania Tri-State Point

Mechanicsville is an unincorporated community in New Castle County, Delaware, United States.The community is located in "The Wedge", a geometric oddity arising out of ambiguity in the 18th-century border dispute settlement between the Penns and Calverts in the British North American colonies. Until 1921, Mechanicsville was claimed by both Pennsylvania and Delaware. A resolution allocated Mechanicsville and The Wedge to Delaware, which owns it today.

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 (part of Virginia until 1863). 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 (Pennsylvania and Delaware). The largest portion of the Mason–Dixon line, along the southern Pennsylvania border, later became informally known as the boundary between the Southern slave states and Northern free states. This usage came to prominence during the debate around the Missouri Compromise of 1820, when drawing boundaries between slave and free territory was an issue, and resurfaced during the American Civil War, with border states also coming into play. The Confederate States of America claimed the Virginia portion of the line as part of its northern border, although it never exercised meaningful control that far north – especially after West Virginia separated from Virginia and joined the Union as a separate state in 1863. It is still used today in the figurative sense of a line that separates the Northeast and South culturally, politically, and socially (see Dixie).

The Wedge (or Delaware Wedge) is a 1.068-square-mile (684-acre; 2.77 km2) 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.

Thompson Farm, also known as the Pierson Farm, is a historic home and farm located in London Britain Township, Chester County, Pennsylvania. It has five contributing buildings. They are a brick farmhouse, a stone and frame bank barn (c. 1800), frame outhouse, chicken house, and corn crib. The farmhouse was built in 1833, and expanded in 1857.It was added to the National Register of Historic Places in 1983.

Strickersville is an unincorporated community in extreme southeastern Chester County, Pennsylvania, United States. It is located at the intersection of Pennsylvania Route 896 and Strickersville Road in London Britain Township. While it once supported a number of small businesses in the late 19th century, today its location is marked only by the aforementioned crossroads and several historic homes. Lunn's Tavern, a large stone and brick building just north of the Strickersville Road intersection, is a listed in the National Register of Historic Places.

Lunn's Tavern, also known as The Wilkins Property, is a historic inn and tavern located in London Britain Township, Chester County, Pennsylvania. It has three sections. The original section was built about 1760, and is a two-story, stone structure with a gambrel roof. Part of the original section was altered when the brick addition was made in 1830. The modifications included adding stucco to the stone exterior walls and modifying the roof to the gable style. The 1830 brick addition has a wooden porch structure. It was the site of the writing of a famous letter from Thomas McKean to George Read on September 26, 1777, detailing the situation in Delaware and his actions upon assuming the presidency of the State of Delaware.It was added to the National Register of Historic Places in 1979.

Wesley Methodist Episcopal Church is a historic Methodist Episcopal church located at McClellandville, New Castle County, Delaware. It was built in 1854, and is a frame, one story, one bay by three bay, gable-roofed Greek Revival-style building. It was sheathed in weatherboard and featured decorative wood shingles on the facade and corner pilasters.It was added to the National Register of Historic Places in 1983.

McClellandville is an unincorporated community in New Castle County, in the U.S. state of Delaware. McClellandville is located at the intersection of Delaware Route 896 and Wedgewood Road, northwest of Newark.

Samuel Lindsey House is a historic home located at McClellandville, New Castle County, Delaware. It was built in the 1870s, and is a 2+1⁄2-story, Second Empire style brick dwelling with a mansard roof. It has a five bay front facade and an original two story, brick wing extending from the rear elevation. Built as a single dwelling, it has been converted into apartments at one time, and also used as a school.It was added to the National Register of Historic Places in 1983.

White Clay Creek Preserve is a 3,050-acre (1,230 ha) Pennsylvania state park along the valley of White Clay Creek in London Britain Township in Chester County, Pennsylvania in the United States. The park was donated by the DuPont Company in 1984 for the purpose of "preserving the diverse and unique plant and animal species, and the rich cultural heritage of the area". Dupont also donated an additional 528 acres (214 ha) for the adjoining White Clay Creek State Park to the state of Delaware. White Clay Creek Preserve is 3 miles (4.8 km) north of Newark, Delaware on Pennsylvania Route 896. The preserve is supported by the Friends of White Clay Creek Preserve.

Chambers House, also known as "Stairways", is a historic home located near Newark, New Castle County, Delaware. It was built between 1816 and 1852, and is a two- to three-story, Penn Plan bank house built of uncoursed fieldstone. It has a one and two story frame addition at the east of the house dated to the late 19th century.It was added to the National Register of Historic Places in 1988.

White Clay Creek State Park is a Delaware state park along White Clay Creek on 3,647 acres (1,476 ha) in New Castle County, near Newark, Delaware in the United States. North of the park is Pennsylvania's White Clay Creek Preserve, and the two were originally operated as bi-state parks to jointly protect the creek, but now they operate separately. The White Clay Creek is federally protected as part of the National Park Service's National Wild and Scenic Rivers System. White Clay Creek State Park offers 37 miles (60 km) of nature and fitness trails which are open to hiking and mountain biking 365 days a year with access at a number of seasonal day-use fee parking lots. Fee season is in effect March 1 - November 30. Fees are $4 for in-state vehicle or $8 for out of state vehicles. Annual passes can be purchased at any DE State Park Office or online. The park also preserves a number of historic structures and operates a nature center. It is part of the Northeastern coastal forests ecoregion.