Xoiiku, I've been wanting to preserve some of the Jungle landscape around my home on the member world. Some is already under project protection. Mnimal structures, like a partially hidden temple, small bungalow, small treefort, etc. Nothing big, and no clearing. In fact, there's a lot of good terrain around my place that could be preserved.
As far as a railway, the idea pops up frequently, then sputters and dies with no lasting result.