How about making a huge pile of stone resonate at 432 Hz.

And... that is just ignored.
Its called a tomb... although no corpses were found inside.

It has no writing anywhere in it, while everything else in the region has writing like the walls in gang territory.

Well, the thing was a power generator, but then we went and dynamited the thing in several places because... we couldn't even figure out how to move a big rock.