Newlin Township, Pennsylvania

Hayes Homestead, also known as Green Lawn Farm, is an historic, American home that is located in Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

Mountain Meadow Farm is a historic home and barn located in Newlin Township, Chester County, Pennsylvania. The house was built about 1800, and is a two-story, brick dwelling with basement and attic in the Georgian style. A rear addition was built in 1951. It has a gable roof, full width front porch, and double-door facade. The large stone and frame bank barn was built about 1860.It was added to the National Register of Historic Places in 1985.

The Jacob Hayes House is an historic home that is located in Newlin Township, Chester County, Pennsylvania near the West Branch of Brandywine Creek. It was added to the National Register of Historic Places in 1985.

Embreeville is a historical unincorporated community, little more than a rural stretch of road with a few businesses and homes, in Newlin Township, Pennsylvania, United States, on a bend of Brandywine Creek. It is approximately 30 miles (48 km) west of Philadelphia, and north of Unionville. The Embreeville Historic District, which covers most of the town, is on the National Register of Historic Places.During the 19th and 20th centuries Embreeville was best known as the site of the county poor house and the Chester County Asylum for the Insane, renamed Embreeville State Hospital in 1938 and closed in 1980. Embreeville's other landmarks include the Embreeville Dam, Embreeville Mill, Pennsylvania State Police Barracks, Star Gazers' Stone, and Hannah Freeman's grave. The Star Gazers' Stone marked an important astronomical observation point used by Charles Mason and Jeremiah Dixon in 1764 in surveying the Mason-Dixon line, which lies 15 miles south of the stone. It is also the location to a Pennsylvania state police station.

The Hayes Mill House is an historic, American home that is located in Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

Star Gazers' Stone located on Star Gazers' Farm near Embreeville, Pennsylvania, USA, marks the site of a temporary observatory established in January 1764 by Charles Mason and Jeremiah Dixon which they used in their survey of the Mason-Dixon line. The stone was placed by Mason and Dixon about 700 feet (213 m) north of the Harlan House, which was used as a base of operations by Mason and Dixon through the four-and-a-half-year-long survey. Selected to be about 31 miles (50 km) west of the then southernmost point in Philadelphia, the observatory was used to determine the precise latitude of its location. The latitude of the Maryland-Pennsylvania border was then set to be 15 miles (24.1 km) south of the point in Philadelphia. The farm, including the house and stone, were listed on the National Register of Historic Places on May 9, 1985. In 2013 construction was completed on a parking area to allow public access to Star Gazers Stone.Built c. 1724 near the forks of the Brandywine, the Harlan House was enlarged c.1758, and is likely the first house built in Newlin Township. The Harlan family lived in the house until 1956, and carefully preserved the location of the stone through the generations.

Hannah Freeman (March 1731 – March 20, 1802), also known as "Indian Hannah," was a Lenape healer, artisan, and farmer who historically was thought to be the last surviving member of the Lenape in Chester County, Pennsylvania.

The Joseph Young House is an historic home that is located in Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

The Green Valley Historic District is a national historic district which is located in East Marlborough Township and Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

The Spruce Grove School is an historic, American, one-room school that is located in Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

The Worker's House at Lower Laurel Iron Works is an historic, American double house that is located in Newlin Township, Chester County, Pennsylvania. It was added to the National Register of Historic Places in 1985.

Buck Run is a tributary of West Branch Brandywine Creek in Chester County, Pennsylvania, in the United States. It is approximately 17.2 miles (27.7 km) long and flows through West Sadsbury Township, Sadsbury Township, Pomeroy, Highland Township, East Fallowfield Township, West Marlborough Township, and Newlin Township. The watershed of the stream has an area of 48.6 square miles (126 km2). Its named tributaries include Doe Run and Birch Run. The stream's waters are slightly alkaline and contain various dissolved metals and nonmetals. Rock formations of shale, sandstone, and limestone occur in the watershed. Three covered bridges and several other bridges have been built over the stream. Additionally, a number of mills historically operated along the stream. Mayflies, stoneflies, and caddisflies inhabit the vicinity of the stream. Additionally, trout inhabit the stream.