The Garden Club of America erected entrance markers in 1932 as part of the George Washington bicentennial celebration. These are stone pylons located at several entrances to the district. Some of them have been lost due to time, but this one on Georga Ave still exists.
From Wikipedia:
"The markers were designed by architect Edward Donn, who based them on the milestones set up in 1761 along the Mason–Dixon line denoting the Pennsylvania-Maryland boundary. Installed between April 1932 and October 1933, the markers are composed of Aquia Creek sandstone and bear the Seal of Maryland on one side and the Cartouche of the District of Columbia on the opposite side. The cartouche depicts George Washington with Lady Justice, a laurel wreath, the rising sun, and the capitol dome."
From the National Register of Historic Places registration form for this marker:
"The Georgia Avenue marker is a single marker located in a median on-center of the avenue with its original metal bollard and chain fence surrounding it. The median is located just north of the intersection of Kalmia Road on the west and Alaska Avenue on the east, both marking the District line into Maryland. The central location of the marker may indicate that this was originally planned to be a single marker rather than one of a pair of markers. However, period archival resources refer to the "pair" of markers at Georgia Avenue indicating that two markers likely existed at one time. Nothing is known about the existence or whereabouts of the second marker."
There are 7 markers (located at 4 sites) that still exist today. This multicache takes you to the location of the Georgia Avenue NW marker, as well as another example of one of many still exisiting historic DC structures at the final location. Use caution in this area as it is near a busy intersection. I parked on Kalmia Road NW while I was hiding this cache.
Finding the geocache:
The final is located at N 38° 59.ABC W 077° 01.DDD
Looking directly west at the posted coordinates, there is a sign that notes a restriction for trucks on Kalmia Road Northwest
A = Number of letters on the second word of the sign minus 4
B = Number of letters on the sixth (last) word of the sign minus 2
C = Number of letters on the first word of the sign
Now, looking directly east at the posted coordinates, there is a small blue sign on top of the Georgia Ave NW 7800 street sign that denotes the street as a certain type of route.
D = Number of Letters in the first word minus 3
Checksum: A + B + C + D = 15
The final is a short walk away.
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certitude.
Check out the other caches in this series: