No archaeological evidence near Mount Shoria.
The fact its part of a mountain suggests processes that make mountains were at play… the faults crack the layers… the mountain also suffers weathering…
Here’s how faults can crack rocks… this is before the weathering stage, so you can see that its not man made at all.
There may be iron inclusions that affect the magnetic compass. You can see iron at the Tessellated pavement, its creating the raised effect at the joints (but iron deposits may appear at any wet granite … not just the cracked ones… ) The water migrating through the porosity of the rock deposits iron at the surface.