Green Valley Historic District

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 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.

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.

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.

House at Upper Laurel Iron Works is a historic home located in Newlin Township, Chester County, Pennsylvania. It was built about 1872, and is a two-story, stone banked dwelling with a gable roof.It was added to the National Register of Historic Places in 1985.

Newlin Township is a township in Chester County, Pennsylvania, United States. The population was 1,285 at the 2010 census. Newlin Township was the hometown of explorer Josiah Harlan and Lenape healer Hannah Freeman. William Baldwin, the botanist, was born there on the 29th of March 1779.

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.

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.

Mortonville is an unincorporated area and historic hamlet in Chester County, Pennsylvania, United States, situated on the eastern bank of the West Branch Brandywine Creek. It consists of approximately one-half dozen structures, two of which are on the National Register of Historic Places: the Mortonville Hotel, and the 12.5-foot-long (3.8 m) "Bridge in East Fallowfield Township" which crosses a mill race a few feet east of a larger bridge. The larger bridge, known as the Mortonville Bridge, was also listed on the NRHP until 2010, when it was delisted following a renovation. The two bridges are in East Fallowfield Township, while most other structures are in Newlin Township.

The Mortonville Bridge and Mill Race Bridge are stone arch bridges carrying Strasburg Road across the West Branch Brandywine Creek and an abandoned millrace at Mortonville, Pennsylvania. The Mortonville Bridge was placed on the National Register of Historic Places on September 18, 1985, while the Mill Race Bridge was added as the Bridge in East Fallowfield Township on June 22, 1988. The Mortonville Bridge was removed from the Register on July 16, 2010, following reconstruction; the Mill Race Bridge remains registered. The first bridges on the site were probably built about 1772 when Strasburg Road was surveyed and constructed. A wooden bridge over the Brandywine was built in 1789. Of the current bridges, the millrace bridge was built about 1800 as a single stone arch, using stone from a local quarry upstream. It spanned the head race for Hayes Mill. A four-arch stone bridge over the Brandywine replaced the 1789 wooden structure in 1826, also using local stone.From the 1980s to 2002, PennDOT put forth a series of plans for the replacement of both bridges by a single modern structure. However, local opposition was considerable, and PennDOT ultimately rebuilt and widened the bridge by 6 feet in 2009 during a 10-month closure. It was closed again in 2010 to lengthen retaining walls on the approach.

Mortonville Hotel is a historic hotel located in East Fallowfield Township, Chester County, Pennsylvania. It was built in 1796 as a dwelling, and converted to a hotel in 1849. It is a three-story, seven-bay, stuccoed stone structure with a shallow gable roof. It is partially banked, and features first and second floor verandahs.It was added to the National Register of Historic Places in 1985.