Travelers are voting Heart of Neolithic Orkney and Scotland as the best places to visit in St. Mary's County. There are 2 places to visit in Allen a city just 33 km from St. Mary's County and 1 place to visit in Dahlgren which is 35 km distant. The most popular of these are Princess Anne in Allen and George Washington Birthplace National Monument in Dahlgren. You can find 252 places to visit in Maryland and 19346 places to visit in the country of United States. Our members favorite in Maryland is Baltimore and New York City is the top pick in United States. Want more? Check out our map of places to visit in St. Mary's County.