What shape do you see?

Historical marker location:

Arboretum, District of Columbia

( Marker can be reached from Meadow Road Northeast just west of Ellipse Road Northeast, on the right when traveling west.)

(Hint: It is not a tree)

The District was originally called "Federal City": The name "Washington, D.C." was not officially adopted until the late 19th century. Before that, the city was referred to as "Federal City" or simply "Washington."