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Wikipedia: National Historic Landmarks in Pennsylvania: Summerseat
A home of George Clymer, a signer of the Declaration of Independence and the U.S. Constitution.
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Wikipedia: National Historic Landmarks in Pennsylvania: Union Canal Tunnel
An image of the Union Canal Tunnel.
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Wikipedia: National Historic Landmarks in Pennsylvania: Carlisle Indian School
Associated with Native American education. Athlete Jim Thorpe attended.
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Wikipedia: National Historic Landmarks in Pennsylvania: David Bradford House
A home of David Bradford.
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Wikipedia: National Historic Landmarks in Pennsylvania: Waynesborough
Home of General Anthony Wayne.
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Wikipedia: National Historic Landmarks in Pennsylvania: Benjamin West Birthplace
Birthplace of Benjamin West who supported artists including Gilbert Stuart and Charles Willson Peale. On campus of Swarthmore College.
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Wikipedia: Natl Historic Landmarks in Pa: Allegheny County Courthouse and Jail
Spectacular jail and courthouse designed by architect Henry Hobson Richardson in a Romanesque style.
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Wikipedia: National Historic Landmarks in Pennsylvania: Joseph Priestley House
Stately home of chemist Joseph Priestley, who, disenchanted with England moved here in 1794 and continued his ground-breaking research.
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Wikipedia: National Historic Landmarks in Pennsylvania: Robert Fulton Birthplace
Also associated with Robert Fulton.
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Wikipedia: National Historic Landmarks in Pennsylvania: Beth Sholom Synagogue
Frank Lloyd Wright designed it. The American Institute of Architects and National Trust for Historic Preservation commented upon it.
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Wikipedia: National Historic Landmarks in Pennsylvania: Horseshoe Curve
A horseshoe-shaped railroad track.
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Wikipedia: National Historic Landmarks in Pennsylvania: Mill Grove
A home of John James Audubon.
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Wikipedia: Natl Historic Landmarks in Pennsylvania: Terence v. Powderly House
Longtime home of Terence Vincent Powderly, a Knights of Labor leader.
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Wikipedia: Natl Historic Landmarks in Pa: Oakmont Country Club Historic District
Host to many U.S. Opens.
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Wikipedia: Natl Historic Landmarks in Pennsylvania: Minisink Archeological Site
An image of the Minisink Archeological Site.
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Wikipedia: National Historic Landmarks in Pennsylvania: F. Julius Lemoyne House
A home of F. Julius LeMoyne, involved with the Underground Railroad.
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Wikipedia: National Historic Landmarks in Pennsylvania: The Printzhof
A home of Johan Printz.
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Wikipedia: Natl Historic Landmarks in Pennsylvania: Merion Friends Meeting House
An image of the Merion Friends Meeting House.
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Wikipedia: National Historic Landmarks in Pennsylvania: Staple Bend Tunnel
The first railroad tunnel in the United States. Regarded as an engineering marvel.
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Wikipedia: National Historic Landmarks in Pennsylvania: Wharton Esherick Studio
A studio of Wharton Esherick who participated in Arts and Crafts Movement.
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Wikipedia: National Historic Landmarks in Pennsylvania: Honey Hollow Watershed
An image of the Honey Hollow Watershed.
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Wikipedia: National Historic Landmarks in Pennsylvania: Cambria Iron Company
An image of the Cambria Iron Company.
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Wikipedia: National Historic Landmarks in Pennsylvania: Green Hills Farm
A home of author Pearl S. Buck.
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Wikipedia: National Historic Landmarks in Pennsylvania: Forks of the Ohio
Associated with French and Indian War.