Wikipedia has a fantastic article on Ireland including a good picture of all major mountains and rivers as well as major train stations and rail tracks.
Its good. The shape is accurate. It is all a bit flat though. I'm from the north and cant wait to get in and fix up a missing Lough Neagh, River Bann and put in the beautiful hills of Antrim, the Mourne Mnts and the world renown Antrim coast.