DescentBB

right here

the beige line running for upper left to lower right.

I think this is where it starts in the eastern part of china.

looks like a highway. Back it off a notch.

the great wall has many curves.
look at the satellite picture: http://de.wikipedia.org/wiki/Chinesische_Mauer

the english page is completely different and doesn't show the satellite pic :/
http://en.wikipedia.org/wiki/Great_Wall_of_China