Mount Airy Historic District (Bethlehem, Pennsylvania)

Martin Tower was a 21-story, 101.2 m (332 ft) building at 1170 8th Avenue in Bethlehem, Pennsylvania. It was the tallest building in both Bethlehem and the greater Lehigh Valley, 8 ft (2.4 m) taller than the PPL Building in Allentown. Martin Tower was placed on the National Register of Historic Places on June 28, 2010. Originally built as the headquarters of now-defunct Bethlehem Steel, the building, which once dominated Bethlehem's city's skyline, was completed in 1972. It stood vacant from 2007 until its eventual demolition on May 19, 2019 at 7:03 AM EDT.

St. Luke's University Health Network (SLUHN) is a non-profit network of 12 hospitals and over 300 outpatient sites. The health network is headquartered in Fountain Hill, Pennsylvania, although it is often erroneously listed as being headquartered in neighboring Bethlehem, Pennsylvania. Both municipalities are in the Lehigh Valley region of eastern Pennsylvania and the Network has over 16,000 employees.

Bethlehem Armory also known as Floyd Simons Armory, is a historic National Guard armory located in Bethlehem in Lehigh County, Pennsylvania. It was built in 1930, and is an "I"-plan brick building in three sections. It consists of a two-story administration building, drill hall, and kitchen / locker room executed in the Art Deco style. It measures 82 by 102 feet (25 by 31 m), and has a hipped roof. Additions were built in 1938 and 1968.It was added to the National Register of Historic Places in 1991.

The Burnside Plantation is a 6.5-acre (2.6 ha) plantation in Bethlehem, Pennsylvania and was listed on the National Register of Historic Places in 1990. It is also known as the James Burnside Plantation and Lerch Farm. The plantation is located 0.2 miles (0.32 km) southeast of the intersection with Eaton Ave, on Schoenersville Road.

The Lehigh Valley Silk Mills were a collection of mills located in the Lehigh Valley region of eastern Pennsylvania in the 19th and 20th centuries. The industry began in 1881 and thrived throughout the Second Industrial Revolution. The Lehigh Valley Silk Mills also refers to a specific company that owned the Lipps & Sutton Silk Mill and Warren Mill. The first silk mill in the Lehigh Valley opened in 1881 and was followed by the opening of many others. By 1900, there were twenty-three silk establishments in the Lehigh Valley, making Pennsylvania the second largest producer of silk in the world. The silk industry in Pennsylvania peaked in the late 1920s due to cheap labor, mainly from immigrant workers' children and wives. However, after the Great Depression, increasing labor unrest and competition from other textile industries began to affect the silk industry locally and nationally. By 1953, Allentown had become the number one silk city in the world, but even then, the number of looms had decreased. At the time, only six mills continued to work with silk exclusively. Other mills either shut down due to bankruptcy or shifted to the production synthetic fibers.

The Hill to Hill Bridge is a road crossing of the Lehigh River and linking the south and north sides of Bethlehem, Pennsylvania in the Lehigh Valley region of eastern Pennsylvania. Completed in 1924, Hill to Hill Bridge carries Pennsylvania Route 378 from Wyandotte Street on Bethlehem's south side to a series of ramps and viaducts on the north side. It replaced a two-lane covered bridge and eliminated several grade crossings of three railroads on the two banks of the Lehigh River. The Hill to Hill Bridge is located in the Central Bethlehem Historic District and was added to the National Register of Historic Places in 1972 with a boundary increase to the designation added in 1988.

Central Park is a former amusement park in the Rittersville section of Allentown, Pennsylvania. It was closed in 1951.

The Lehigh Valley Railroad Headquarters Building, also known as the Conrail Building, is an historic American office building that is located in Bethlehem, Northampton County, Pennsylvania. It was added to the National Register of Historic Places in 1984.

The Tannery is a historic tannery building constructed by the colonial Moravians in Bethlehem, Northampton County, Pennsylvania. It is a limestone building built in 1761, and is part of the Bethlehem Colonial Industrial Quarter.It was added to the National Register of Historic Places in 1972. The building is part of the Historic Moravian Bethlehem District which was designated as a National Historic Landmark District in 2012 and later nominated to the U.S. Tentative List in 2016 for consideration to become a World Heritage Site.

Fountain Hill Historic District is a national historic district located at Bethlehem, Lehigh County and Northampton County, Pennsylvania. Despite the name, it is mostly excludes the borough of Fountain Hill, which is an independent municipality located mostly to the southwest of the district. The district includes 44 contributing buildings and 1 contributing structure. The buildings include elaborate, architecturally distinctive mansions, smaller managers' and merchants' dwellings, and public church buildings. The mansions are the focus of the district and include the Linderman / Schwab Mansion (c. 1870), Robert Sayre House (c. 1857), and Elisha Packer Wilbur Mansion (c. 1863). Notable non-residential buildings include the Masonic Temple and Cathedral Church of the Nativity (c. 1866). The Hill to Hill Bridge is also included in the district. Located in the district is the separately listed Lehigh Valley Railroad Headquarters Building.It was added to the National Register of Historic Places in 1988.

The Colonial Industrial Quarter in Bethlehem, Pennsylvania is considered America's earliest industrial park. Established by the colonial Moravians along the banks of the Monocacy Creek, the ten-acre site contains historic buildings such as the 1762 Waterworks (A National Historic Landmark), 1761 Tannery, 1869 Luckenbach Mill, 1748/1834 Gristmiller's House, reconstructed 1764 Springhouse and 1750 Smithy, as well as ruins of the original 1749 Pottery, 1752 Butchery, 1765 Oil Mill, and 1771 Dye House. This location was chosen to take advantage of a spring that supplied potable water and the power supplied by the Monocacy Creek's flow for the craftsmen and trades of early Bethlehem. The Colonial Industrial Quarter is part of the Historic Moravian Bethlehem District which was designated as a National Historic Landmark District in 2012 and later named to the U.S. Tentative List in 2016 for nomination to the World Heritage List. The Colonial Industrial Quarter is also known as the location of several annual events and festivals including the Historic Turkey Trot 5K, Musikfest, and Celtic Classic.

Bethlehem Silk Mill is a historic silk mill complex located in Bethlehem, Northampton County, Pennsylvania. It was built in 1886, and expanded about 1896 and about 1901. The complex once consisted of a total of seven interconnected historic buildings that formed an open rectangular plan around two central courtyards. Some of the buildings have been demolished. All of the buildings were constructed of red brick with stone foundations.It was added to the National Register of Historic Places in 2005.