Adams

Adams, county, southern Pennsylvania, U.S., mostly consisting of a piedmont region bordered by Maryland to the south and the Blue Ridge Mountains to the west and north. The principal waterways are Lakes Meade and Heritage and Long Pine Run Reservoir, as well as Conewago, Toms, and Rock creeks. Parklands include parts of Caledonia State Park and Michaux State Forest, as well as Gettysburg National Military Park—which nearly surrounds Gettysburg, the county seat—and the Eisenhower National...