Harford County GovernmentProgram of the U. S. Department of the Interior, National Park Service, and administered by the Maryland Historical Trust. It recognizes districts, buildings, structures, objects, and sites for their significance in American history, archeology, architecture, engineering, or culture, and identifies them as worthy of preservation.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/f5137b12182c425fbad1f68e1ad92da5_0engHarford County Planning and Zoning Open GISPublicNational Register Sites [Maryland--Harford County]Web servicesMaryland--Harford CountyMarylandLast Modified: 2018-11-19