CACHE IS NOT AT THE LISTED CO-ORDINATES!
I have tried to make this as an educational Journey as to How the Mayan Calendar worked, as we understand it. There is a little bit of work needed to trace down information and 'work out' what is needed. Hopefully, It is not too difficult.
The idea is based on the so called 'Mayan Prediction' of disaster... when in reality it was a “rollover” day
MAYA CALENDAR.
The Maya calendar consists of several cycles or counts of different lengths. The 260-day count is known to scholars as the Tzolkin, or Tzolk'in. The Tzolkin was combined with a 365-day vague solar year known as the Haab' to form a synchronized cycle lasting for 52 Haab', called the Calendar Round. Smaller cycles of 13 days, the trecena, and 20 days, the veintena, were important components of both cycles.
A different calendar was used to track longer periods of time, and for the inscription of calendar dates (i.e., identifying when one event occurred in relation to others). This is the Long Count. It is a count of days since a mythological starting-point. [Wikipedia]
This 'creation' date has been calculated as 11th August 3114 BCE in our current dating system [see picture] and the 'reset' date at 21st December 2012 AD. (calendar based on integer arithmetic)

In the above sketches are more recent Mayan Dates. Take each sketch and translate that into our present day system and you will get dd / mm / yyyy (AB CD EFGH for each one)
Sketch A = N28º 27. (A+B)(CD/3)[(E+F+G+H) /5]
Sketch B = W016º 20.(A+B)(C+D)(F+G+H)
This cache is dedicated to an Exploration Geologist down in Australia

This is No 7 of 16 ....... in the Heart Series