List of National Historic Landmarks in Maryland

Columns: Landmark name | Date designated | Location | County | Description
8 | Carrollton Viaduct | November 11 , 1971 ( # 71001032 ) | Baltimore 39°16′24″N 76°39′19″W / 39.27339°N 76.65529°W / 39.27339 ; -76.65529 ( Carrollton Viaduct ) | City of Baltimore | Oldest operating railway bridge in the world | 9 | Rachel Carson House | December 4 , 1991 ( # 91002058 ) | Silver Spring 39°02′48″N 77°00′03″W / 39.04667°N 77.00092°W / 39.04667 ; -77.00092 ( Rachel Carson House ) | Montgomery | House where Rachel Carson wrote her classic work Silent Spring in 1962 | 10 | Casselmans Bridge , National Road | January 29 , 1964 ( # 66000391 ) | Grantsville 39°41′48″N 79°08′37″W / 39.696667°N 79.143611°W / 39.696667 ; -79.143611 ( Casselmans Bridge , National Road ) | Garrett | Bridge built in 1813 on the National Road , the nation 's first major public works project | 11 | Whittaker Chambers Farm | May 17 , 1988 ( # 88001824 ) | Westminster 39°39′35″N 76°58′35″W / 39.659722°N 76.976389°W / 39.659722 ; -76.976389 ( Whittaker Chambers Farm ) | Carroll | Farm home of Whittaker Chambers , accuser of Alger Hiss ; papers hidden here in a pumpkin led to Hiss 's conviction ; Chambers wrote Witness , his best-selling autobiography , here | 12 | Chase-Lloyd House | April 15 , 1970 ( # 70000260 ) | Annapolis 38°58′52″N 76°29′18″W / 38.98121°N 76.48838°W / 38.98121 ; -76.48838 ( Chase-Lloyd House ) | Anne Arundel | Three-story brick Georgian mansion dating from 1769-1774 | 13 | Chestertown Historic District | April 15 , 1970 ( # 70000263 ) | Chestertown 39°12′45″N 76°04′10″W / 39.2125°N 76.069444°W / 39.2125 ; -76.069444 ( Chestertown Historic District ) | Kent | 14 | College of Medicine of Maryland | September 25 , 1997 ( # 97001275 ) | Baltimore 39°17′07″N 76°37′25″W / 39.28518°N 76.62362°W / 39.28518 ; -76.62362 ( College of Medicine of Maryland ) | City of Baltimore | Oldest medical school building in the U.S

Example questions:
Who designed a house , current National Historic landmark in Maryland , in the county seat of Anne Arundel County ? | What is the population of the county where a current National Historic landmark in Maryland known as Moyaone is ? | How far north of Washington D.C. is the is the city with a current National Historic landmark in Maryland at 12 West Franklin Street is ? | What is the population of the county where a current National Historic landmark in Maryland was built in 1830 ?

Answers:
William Buckland | 863,420 | 40 miles | 287,085