I found this while looking at Google Earth.
What do you suppose it might be?
I also found what appears to be an entrance to a cavern or something.
What do you think?
If you follow the 10 mile wide track downwards, it goes for hundreds of miles and also branches off onto many other tracks which are 10 miles wide. I don't think these are natural.
The line eventually meets up with an
intersection and you can follow that for hundreds of miles in a NE direction, and then it hits another intersectiopn where you can head east or west back to the original line.