>>39544046The map isn't 1:1. Certain things are bigger than they appear on it, including the cliff by the leaning tower.
It goes a bit further than before, but you can clearly see how it is stopping in the upper left corner of that image. Shit is blurry as fuck due to the weather effects and youtube compression, but it even looks like the flatter part there could be the start of the railway itself.
We're basically looking at the upper half of that lake, not the lower half where the railway would be and seems to be obscured by all the trees.