j_seph
Senior Member
I thought grave but its like 8ft long and 6ft wide
Do not go back there. In fact, forget you ever saw it.
If you absolutely must go back, go with someone and be carrying.
You've been warned
looks like there are more rocks directly across those in the creek bed piled up almost the same way. An old bridge maybe?
It does look like a foundation. Is this public land ? If private maybe you could do a little light excavation to see what you might find.