 It was home to Robert King Carter in the 18th century, and remaining buildings from that time include Christ Church and St. Mary's, Whitechapel.Other historic attractions open to the public include the Lancaster Courthouse Historic District including the Mary Ball Washington Museum and Library, Belle Isle State Park, and the Village of Morattico Historic District.According to the U.S. Census Bureau, the county has a total area of , of which is land and (42.4%) is water.