The boulder was unfortunately moved from its original location by the landowners. Based on account of landowners who first witnessed this rock, the hole was originally hidden from sight - it was facing the ground. They moved it and dug that portion. While digging, they encountered three (3) small rocks equally formed in triangle that was buried under (no photos of it - the landowners lack resources at that time). They removed it and continue to dig, thereafter they found a turtle-like shape rock (unfortunately they broke this rock - have no photos also). After this turtle-shaped rock, they encountered two (2) huge rocks that made them to stop the operation (dead end for them due to lack of demolition equipment).
When we came to the scene, we continue to dig (this is where our generator, jackhammer etc. malfunctioned - as i shared in Paranormal Topic here in the forum). While digging, we subsequently found a seemingly Japanese character at the side of the wall where we were digging (attached photo). We stopped the digging after our equipment malfunctioned. This excavation site of ours is more or less 5 feet deep.
Now we have purchased brand new equipment. We are breaking this rock at present so to eliminate one of the possibilities that the object could be inside the rock. This rock and digging area reacting to both detector (Lorenz Deepmax) and dowsing rod. We will continue the digging once this rock has been broken into pieces. While breaking this rock, the brand new drill bit of our rotary hammer got broken (we're currently finding ways to address this).
This rock is located near a creek, near a waterfalls. Will find if i have some photos of the location, will post it then.
Thanks,
Ph