The Antonine Wall was a brief and very simplified version of Hadrians Wall. 
You can now walk a trail the entire length of the latter.   Like the Chinese 
wall, both were designed to mark a boundary, not to keep people in like the 
Berlin Wall.   I read somewhere that the Wall of China is the only human feature 
svisible from the moon.   Maybe the lights of LA can now complete with it.   
When they merasure it, will they use metric? Chinese li? Certainly not the 
English system! The westward extension of the wall is particularly interesting. 
Aurel Stein in Ca. 1910 found a series of forts and signal stations along the 
northern fringe of the Tarim Basin, similar to signal stations in Roman Britain 
and the Rhine-Danube frontiers. Perhaps some Roman military engineers liberated 
from the Partians by the Han armies lent their expertise?   If so, this will 
almost certainlhy result in a scientific cover-up similar to that of the red 
haired Tocharian mummies of the same area. These connections are always 
fascinating but speculative.

Bob Hoover