Bethlehem

Bethlehem lies in the geographic center of the Lehigh Valley, a metropolitan region of 731 sq mi (1,890 km2) with a population of 861,899 people as of the 2020 census that is Pennsylvania's third-most populous metropolitan area and the 68th-most populated metropolitan area in the U.S. Bethlehem borders Allentown to its west and is 48 miles (77 km) north of Philadelphia and 72 miles (116 km) west of New York City.

There are four sections to the city: central Bethlehem, the south side, the east side, and the west side. Each of these sections blossomed at different times in the city's development and each contains areas recognized under the National Register of Historic Places. Norfolk Southern Railway's Lehigh Line, formerly the main line of the Lehigh Valley Railroad, runs through Bethlehem heading east to Easton and across the Delaware River to Phillipsburg, New Jersey.