<Tr> <Th> Location </Th> <Td> National Mall, Washington, D.C., United States </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 38 ° 53 ′ 22" N 77 ° 2 ′ 7" W ﻿ / ﻿ 38.88944 ° N 77.03528 ° W ﻿ / 38.88944; - 77.03528 Coordinates: 38 ° 53 ′ 22" N 77 ° 2 ′ 7" W ﻿ / ﻿ 38.88944 ° N 77.03528 ° W ﻿ / 38.88944; - 77.03528 </Td> </Tr> <Tr> <Th> Area </Th> <Td> 106.01 acres (42.90 ha) </Td> </Tr> <Tr> <Th> Visitors </Th> <Td> 671,031 (in 2008) </Td> </Tr>

How big is the base (area) of the washington monument in square feet