National Historic Landmark - Humphry Marshall House

National Historic Landmark - Humphry Marshall House

Constructed in 1773-74 and enlarged in 1801, this two-and-a-half story house was the home of Humphrey Marshall (1722-1801), American botanist and author of ARBUSTUM AMERICANUM, the first account of forest trees and shrubs native ...

National Historic Landmark - Lukens Historic District

National Historic Landmark - Lukens Historic District

This district is associated with Rebecca Lukens (1794-1854), who played a leading role in the 19th-century American iron industry, and her family legacy.

The firm she owned and managed--Brandywine Ironworks (later Lukens Steel Company)--was ...

National Historic Landmark - Lukens Historic District

National Historic Landmark - Lukens Historic District

This district is associated with Rebecca Lukens (1794-1854), who played a leading role in the 19th-century American iron industry, and her family legacy.

The firm she owned and managed--Brandywine Ironworks (later Lukens Steel Company)--was ...

National Historic Landmark - James Logan Home

National Historic Landmark - James Logan Home

From 1730 until his death, this was the residence of James Logan (1674-1751), Chief Justice of the Pennsylvania Supreme Court (1731-39) and a serious botanist.

Courtesy National Park Service National Historical Landmarks

Photo Courtesy Library of ...

National Historic Landmark- Lightfoot Mill

National Historic Landmark- Lightfoot Mill

Lightfoot Mill represents an extremely rare archetypal example of a small, eighteenth century custom grain mill with its surviving, completely intact, power transmission system. Surveys suggest that no other custom mills in the United States survive ...

National Historic Landmark-J. Peter Lesley House

National Historic Landmark- J. Peter Lesley House

From 1869 until 1896, this was the residence and office of J. Peter Lesley (1819-1903), one of America's foremost geologists of that day.

Mr. Lesley served as Geologist for the State of Pennsylvania and ...

National Historic Landmark-Julius F. LeMoyne House

National Historic Landmark- Julius F. LeMoyne House

The LeMoyne House was built in 1812, and was a center of antislavery activity in southwestern Pennsylvania from the 1830s through the end of slavery.

In 1834, LeMoyne joined the Washington Anti-Slavery Society ...

National Historic Landmark-Leap-the-Dips

National Historic Landmark- Leap-the-Dips

Leap-the-Dips is the last known example of a Side-Friction Figure Eight roller coaster. Side Friction Figure Eight roller coasters were once common in amusement parks across North America as well as in parks in other parts of ...

National Historic Landmark-Laurel Hill Cemetery

National Historic Landmark-Laurel Hill Cemetery

Designed by noted Scottish-American architect John Notman in 1836, Philadelphia's Laurel Hill Cemetery is the second major rural cemetery in the United States, and Notman's first known commission.

Its romantic landscape, commemorative monuments, and eclectic architecture ...

National Historic Landmark-Kennywood Park

National Historic Landmark-Kennywood Park

Opened to the public in 1899, this is the best preserved survivor of the trolley park era when street railway companies built suburban amusement parks linked to center cities by trolley.

Kennywood has been called the Roller Coaster ...