The Nascan Lines. I think these lines are smaller than the rest, because they were quite a bit smaller than I expected. This is a tree, kind of hard to make out how they get a tree out of this but at the top you can see the roots then the branches are at the bottom of the picture. I could see these from a metal watch tower that they have erected at the side of the pan american highway. From the tower there are two lines visible, the rest you have to get an airplane to see.