National road is currently US 40, but there are many modernized sections of the road. I live on a section of Old National Road that was cut out of Rt. 40 due to I-70. There are many historical places along US 40, many near me that are old "forts' for keeping the American Indians to the west. The closest one was Miller's Blockhouse. I know where it used to stand (now a PA FBC lake) and its cemetery that has victims of the Easter Massacre. Cemetery has been preserved and has a stone monument, but is difficult to get to since you are prohibited to have motorized vehicles back near it. First time I went back there I got lucky and FBC employees were working on the roadway leading back to it and the gate was unlocked and was able to get verbal permission to drive my van back to the cemetery and blockhouse site. I currently MD and hike back there during the hunting off-season. I have found lots of artifacts and have donated them to the Washington County Historical Society since I have a strong belief that they would have more of a educational value than me hording them for myself. If anyone is interested in this and any other old cemeteries or even detecting at an old county poor farm just outside PA in Ohio County WV let me know. I have permits for both areas, though entering any structures is prohibited due to safety issues including asbestos.