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American Philosophical Society, Philadelphia
West side of the American Philosophical Society, by Ben Franske. Image licensed by Creative Commons Attribution-ShareAlike 3.0 Unported license via Wikimedia.The full official name of the Society is...
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McMillan Sand Filtration Site, Washington, D.C.
Are you looking for something off the tourist track? What about something that at first sight makes little sense? Then the McMillan Sand Filtration Site is for you! Unfortunately, it is closed to...
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The Barnes Foundation, Philadelphia
Albert C Barnes (1874-1951), chemist and art collector. Image available in the public domain.The Barnes Foundation was established in 1922 by Albert C Barnes (1872-1951), an eccentric chemist whose...
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Chemical Heritage Foundation Museum, Philadelphia
Chemical Heritage Foundation Museum, opened 2008The Chemical Heritage Foundation has evolved from the Center for the History of Chemistry which was established in 1982 as a joint project of the...
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Wagner Free Institute of Science, Philadelphia
Wagner Free Institute of Science, from 'Manufacturer and Builder' (1874). Image available in the public domain.The Wagner Free Institute of Science has its origins in the adult education movement which...
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Eastern State Penitentiary, Philadelphia, Pennsylvania
Eastern State Penitentiary, 1829-1971After the last prisoners left Eastern State Penitentiary in 1971, the cats moved in. In the early years after its closure the complex was used as storage by the...
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The battlefields of Gettysburg, Pennsylvania
Black and white photograph of Town of Gettysburg, Pennsylvania, about the time of the Civil War battle. The point of view is about where the Eleventh Corps was positioned. Image available in the public...
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Bell Telephone Laboratories: Manhattan, NYC
Every day thousands of New Yorkers pass by 463 West Street in Manhattan – head down, texting their friends, bobbing their head to the latest One Direction album (God forbid), or just taking in the...
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World’s Tallest Buildings
The formation of tall buildings dates back to the days of the Great Pyramid, where three pyramids were built in the honor of the pharaohs. These pyramids remained the largest structures in the world...
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Harvard College Observatory
Situated in cluster of red brick buildings to the east of Harvard, Harvard College Observatory (HCO) is an astrophysical institution managed by the Harvard University Department of Astronomy. Founded...
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