Lighthouses
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Piney Point Lighthouse, St. Mary's County, Maryland
18001800s18301830s183619th centuryMDMarylandNorth AmericanSaint MarysSt. Mary's CountyUSUSAUnited States of Americaarchitecturebeacondefencedefendhdrhistorichistoricalhistorykeepers houselight houselighthouselighthousesnavigationpharospreservepreventionpreventiveprotectprotectingprotectionsafeguardsafeguardingsafekeepingsafetysecuritysurveillancetowertowers