I apologise for being so dense. I wonder if this is it: I'm entering the caverns by taking the train to a western side track and heading northeast. When I get to where I think I should pick up the train, nothing. I don't hear any rumbling from the cart. I've also tried to re-enter the mines from where the stream from the red caverns lets out and no luck. Is this the path to the northeast right way to enter the mines?
Interestingly, when I return to the spot where I got off the train it's still there. Before getting to the western side track, there's a spot where you can try to jump up to the ledge to the east. It's too high to reach. (Do I need the crate from GOA???) Any thoughts or help would be greatly appreciated. Thank you!