Head of Christiana Presbyterian Church

The James Steel House is a historic home located at Newark, New Castle County, Delaware. The original section, a two-story, two-bay, double-pile, stuccoed brick structure, is dated to the late 18th century. It was doubled in size about 1882, with the facade addition of a two-story, two-bay, frame wing. It features a two-story bay window on the endwall, a pointed-arch attic window, and German siding. The main block has had a series of rear additions during the late 19th and early 20th centuries, creating an overall T-plan.It was listed on the National Register of Historic Places in 1983.

Thomas Phillips Mill Complex is a historic mill complex located at Newark in New Castle County, Delaware. The complex includes a late 18th-century mill owner's house, a circa mid-19th-century miller's house, and a grist mill that was initially constructed in 1795. The mill is a banked, 2+1⁄2-story, gable-roofed building that is constructed of uncoursed rubble fieldstone at its basement and first floor levels, and of weatherboarded frame at its second story and attic levels.It was added to the National Register of Historic Places in 1983.

Bell Farmhouse is a historic home located at Newark in New Castle County, Delaware. The farmhouse was built about 1845 and is a two-story, gable-roofed brick building with an original two-story ell in the rear. It features a massive Doric columned wrap-around porch. Also on the property is a smokehouse, carriage house, and shed.It was added to the National Register of Historic Places in 1983.

The Stuart Randall and Priscilla Kellogg Carswell House is a historic house in Newark, Delaware. Built in 1948, it is an unusual example of International style architecture in Delaware. The house was built by Stuart Carswell (1891–1949) and his wife Priscilla (1907–1991). Carswell, a Delaware native, was a career Army officer who fought in France during World War I. After seeing plans for an International style house in a 1936 issue of Collier's, the Carswells eventually decided they wanted to build a similar house for themselves. They commissioned an updated set of plans from Edward Durell Stone, the architect responsible for the design featured in Collier's, after Carswell's retirement from the military at the end of World War II. The house was completed in December 1948. Stuart Carswell died just six months later, and his widow sold the house in 1956.Starting in 1999, the Carswell House was restored to its original appearance by its owners, both professors at the University of Delaware. The house was listed on the National Register of Historic Places in 2011 and the restoration project was completed the following year.

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.

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.

Blue Hen Farm is a historic home located at Newark in New Castle County, Delaware. It is a stuccoed three story, six bay building built in four phases. The earliest part of the structure dates to the mid-19th century.It was added to the National Register of Historic Places in 1983.

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.

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.

Granite Mansion was a historic home located at Newark in New Castle County, Delaware. It was built in 1844, and was a three-story, three-bay, cubic stuccoed stone building with a flat roof in the Greek Revival style. It had a rear kitchen wing. The house was renovated in 1924 in the Neoclassical style, to add a two-tiered Corinthian porch on the east elevation and a Doric Porte-Cochere on the west elevation. Also on the property were a small stuccoed spring house and one-and-a-half-story frame and stucco building dated to 1924. The house has been demolished and the property occupied by the First Presbyterian Church of Newark. It was added to the National Register of Historic Places in 1983.

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).

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.