FIRST AT ALL YOU NEED TO BRING A BOTTLE OF WATER WITH YOU.!! - THIS IS A WATER GAME PUZZLE!!
The Cache is in a small village, there is a guard at the entree of the village. Tell him you want to visit friends in Moo 4 Soi 6a. " />
To open the cache you need to find the codes of the lock to find that you need to bring water with you at least 1 litre. You have to put the water in the blue water pipe with the arrows. The lower one at the right sight you have open that one also with question marks on it, inside are 5 ping pong balls (Table tennis) and they will come out when you put the water inside with one who has the number of the lock. But don't waste to much time there is a hole in the pipe and the water is leaking out You can take with you a bottle you refill with tap water.
The village I bring you is already 30 years old and it is only 11 km from the center of Chiang Mai and close to Hang Dong you drive to the South, if you arrive by plane you can see the village below you.
The foto above give you an idea about the village. There is also a minibus going from Chiang Mai city out of the village, you can take that one and get out on the entree of Baan Khwan Wiang 1.
I live here already 12 years and don't worry about the neighbours. Have fun and I hope you enjoy the way to open the cache.ç