Somerset County Maryland (Vacant / Not In Use) has 3 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Somerset County places including Isaac & Stephen Marshall. Prominent architectural styles found in Somerset Country are Gothic.
Coventry Parish Ruins
(added 1984 - #84001869)
Off MD 667 , https://npgallery.nps.gov/AssetDetail/NRIS/84001869