The bird sphere is one of several sculptures along the Georges River between East Hills park in the south and Shortland Brush in the north.
This is a simple 2 stage multi. At the location you will find a sign about the bird sphere. Use the information in the sign to get the remaining digits for the caches location.
GZ = S33 53.ABC E150 58 DEF
A) Number of words under “crosscurrents Georges River Artwalks”
B) Diameter of the sphere
C) Number of letters in the artists last name
D+E) Half of the number of recorded bird species in the surrounding area - 25
F) Number of things the "flowing lines" represent - 1