Cache is NOT at the posted coordinates. Solve the puzzle to find the cache!

L=0
How long was Wheels00's longest streak?
100 days = N 41° 34.234' W 87° 47.754'
365 days = N 41° 38.065' W 87° 48.343'
366 days = N 41° 37.605' W 87° 49.002'
487 days = N 41° 36.342' W 87° 47.475'
514 days = N 41° 37.224' W 87° 46.806'
632 days = N 41° 37.551' W 87° 45.905'
790 days = N 41° 37.560' W 87° 44.995'