I will describe this cache as a very interesting spot. I will
explain.

Located on the edge of Kowloon City, the hill was located
beneath the final approach to runway 13 at the non-closed Kai Tak
Airport, and had a large checkerboard red and white pattern painted
onto the hillside as a navigational aid. To steal from Wikipedia, after reaching the
hill aircraft landing at Hong Kong would execute the following
manoeuvre:
Upon reaching a small hill marked with a checkerboard in red and
white, used as a visual reference point on the final approach (in
addition to the middle marker on the Instrument Guidance System),
the pilot needed to make a 47° visual right turn to line up with
the runway and complete the final leg. The aircraft would be just
two nautical miles (3.7 km) from touchdown, at a height of less
than 1,000 feet (300 m) when the turn was made. Typically the plane
would enter the final right turn at a height of about 650 feet (200
m) and exit it at a height of 140 feet (43 m) to line up with the
runway. This manoeuvre has become widely known in the piloting
community as the “Hong Kong Turn” or
“Checkerboard Turn”.
This photo by Daryl Chapman shows how tight the final
approach was, taken from the west side of the airport with the
checkerboard in the background.


This is the place where airplane lovers spot the planes landing
at Kai Tak Airport. At the same time, half of the Kowloon Penisular
& Hong Kong Island is in your sight, defintelly a scenric view
for taking pictures!
The cache is a small plastic container hidden on the top of this
place.
This cache is not an easy one! Good luck! I guess you use
Opencyclemap.