Before anyone chimes in and says that this seems very big and empty and some parts dont look right, please note that those areas are not visible in game (areas such as the bottom of the rail bridge etc.).
It was a huge pain in the ass to get a picture of this as it uses the event layer as a fourth layer in places (such as where the tracks loop behind the cave wall) and so I had to photoshop those bits to get them to look right in the screen. They look fine in game but in the editor they dont show up D:
Also this is 4 images photoshopped into one..... yay!