National Historic Landmark Mystery Cache

The cache is not at the posted coordinates

A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Of over 85,000 places listed on the country's National Register of Historic Places, only some 2,500 are recognized as National Historic Landmarks.

In order to find this cache, you must first determine what National Historic Landmark fits the clues.

• Principal architect Raymond Hood
• Designated NHL 12/23/87
• Was named after John, Jr.

Figure out the NHL?  Good!  Now here's the puzzle:

North coords:
A = 2-4-6
B = 3-5-3
C = 6-4-4
D = 7-3-6
E = 9-2-8
F = 8-6-1

West coords:
G = 1-6-2
H = 4-3-9
I = 5-2-3
J = 7-6-8
K = 2-7-2
L = 9-4-3

FTF honors go to jazzmasters!!!

STF honors go to rhodorooter!!!

The final location can be found here:  N AB C0.DEF W 0GH IJ.0KL

You can validate your puzzle solution with certitude.