[HighRoadToChina]

13th as in 13th ST SE? I am an OOT'er.

[FreeTheHostages]

Nope, 13th Street as in 13th SW (just barely in the SW quandrant, south of Constitution).

The mall -- just south of the mall, a big strip of green (well, theoretically) grass that goes east to west, stretching westward from the U.S. Capitol.

Hang tight and I'm going to find and post a jpg for you.

[FreeTheHostages]

Here you go. Check out this link. North is up on this map. The monument is on the far lower left. Jimmy Valentine's Brother is suggesting that there are good parking places in the lower left of this map, and little lower than the map itself if need be.