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Clickable map of Pennsylvania counties. This is a list of Pennsylvania State Historical Markers which were first placed by the Commonwealth of Pennsylvania in 1914 and are currently overseen by the Pennsylvania Historical and Museum Commission (PHMC) as part of its Historical Markers Program. Since the modern PHMC program began in 1946, [1 ...
Pennsylvania 's physiographic provinces. The Coal Region of Northeastern Pennsylvania has abundant anthracite coal, a high-value energy source. The Geology of Pennsylvania consists of six distinct physiographic provinces, three of which are subdivided into different sections. Each province has its own economic advantages and geologic hazards ...
Pennsylvania is 180 miles (290 km) north to south and 310 miles (500 km) east to west. The total land area is 44,817 square miles (116,080 km 2)—739,200 acres (2,991 km 2) of which are bodies of water. It is the 33rd largest state in the United States. The state's highest point is 3,213 feet (979 m) above sea level at Mount Davis.
This is a list of properties and districts listed on the National Register of Historic Places in Pennsylvania. As of 2015, there are over 3,000 listed sites in Pennsylvania. All 67 counties in Pennsylvania have listings on the National Register. This National Park Service list is complete through NPS recent listings posted September 27, 2024.[1]
The Pennsylvania Geological Survey, or Bureau of Topographic and Geologic Survey (BTGS), is a geological survey enacted by the Pennsylvania General Assembly "to serve the citizens of Pennsylvania by collecting, preserving, and disseminating impartial information on the Commonwealth's geology, geologic resources, and topography in order to contribute to the understanding, wise use, and ...
c. 1678–84. House. Oldest structure in Fairmount Park; possibly the oldest extant house in Philadelphia. Wall House. Elkins Park. 1682. House. Oldest house in Pennsylvania which has had continuous family residency; possibly the oldest stone house in Pennsylvania. Caleb Pusey House.
May 11, 1976. (#73001586) Pittsburgh. 436 Grant Street. 40°26′18″N 79°59′46″W / 40.4384°N 79.9961°W / 40.4384; -79.9961 (Allegheny County Courthouse and Jail) Allegheny. Spectacular jail and courthouse designed by architect Henry Hobson Richardson in a Romanesque style.
Blue Mountain, Blue Mountain Ridge, or the Blue Mountains of Pennsylvania is a ridge of the Appalachian Mountains in eastern Pennsylvania.Forming the southern and eastern edge of the Ridge-and-Valley Appalachians physiographic province in Pennsylvania, Blue Mountain extends 150 miles (240 km) from the Delaware Water Gap on the New Jersey border in the east to Big Gap in Franklin County in ...
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