Something else about the Tau cross. If you find one in the field it could be sending you west. I've seen one in the field that had a short line half way down from the top of the cross and it was pointing east, but it was just a diversion. The way to go was west. If you have one on a map look at the base of the T and see what it's pointing at. If you have a small t on a map check out top and bottom. I've found a couple of big Tau crosses in the field and they were both at the bottom of a narrow canyon about a mile apart. Two different canyons, one led to the other.
This is just a couple of more things you can look for in your search, but it might not work at your site. Good luck.
This is just a couple of more things you can look for in your search, but it might not work at your site. Good luck.