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Cro-Magnon range 30,000 ybp.svg
Martinus Rørbye - En kanon på citadelsvolden - 1826.jpg
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Protectionfactorchernobyl30cm.png
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Above Hoover Dam near Boulder City, Nevada LCCN2011630337.tif.tiff
Forth_Bridge_-_General_view_from_North_Queensferry_hills_depicting_the_three_cantilevers_at_very_nearly_their_full_height.jpg
The John Fitzgerald Kennedy Memorial, a monument to U.S. President John Fitzgerald Kennedy in the West End Historic District of downtown Dallas, Texas LCCN2015631025.tif.tiff
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The 1910 Classical Revival Jeff Davis County courthouse, with its Beaux-Arts clock tower, is notable for its early use of concrete combined with native stone in its construction. Fort Davis, Texas LCCN2014631194.tif.tiff
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