These coordinates have been lost since the mid 1980's. Loh Ah Tsai is one of the original inhabited sites in all of Hong Kong dating back 3000 to 4000 years.
The links below will give you more information about this location. The cache coordinates are not at Loh Ah Tsai, which is about 100 meters away to protect the original site from the public, but if you read the information below you will identify the original site very easy once you are at GZ. **** Please preseve this site in its current state, after all it has survived over 5,000 years to date. ****
Lo Ah Tsai Stone Circle was discovered in the northern part of Lamma Island by K M A Barnett, District Commissioner of the New Territories in 1956. Twenty eight large stones, lying buried in the earth on a slope 100 metres above sea level, form 2 overlapping stones circles.
http://en.wikipedia.org/wiki/Stone_Circles_(Hong_Kong)
This stone circle was investigated by the Hong Kong University Archaeological Team in 1959, 1963 and 1982 respectively.
http://scholarspace.manoa.hawaii.edu/bitstream/handle/10125/16741/AP-v8n1-148-149.pdf?sequence=1
http://scholarspace.manoa.hawaii.edu/bitstream/handle/10125/16793/AP-v12n1-19-26.pdf?sequence=1
http://www.epd.gov.hk/eia/register/profile/latest/esb232/esb232.pdf
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