Please help?

[manangotay]

Hello,

I found a hole with stockpile of small and big stones,

Discovered

After digging

7ft below we found this signs. Can you help me identify this signs?

Thanks!

 

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[manangotay]

This is the pictures of surrounding area

 

[renantagum30]

does it look like an old well of the japanese? do you know of a water locator if indeed it has a water source?