Hi James,
Welcome to the conversation!
Regarding The Causeway Coastal Route there are many possibilities as regards tours to see the sights of this beautiful coastline. There are day trips from Belfast or day trips from Coleraine or Ballycastle. There are also tours focussing on the Game of Thrones locations.
You can see more details about these and other themed tours by visiting our website
https://www.visitcausewaycoastandglens.comand clicking on To Do and then Tours.
The train journey from Coleraine to Derry/Londonderry is a particularly scenic one, hugging first the bank of the River Bann, then the coastline for most of its journey. At one point it goes through two tunnels – one of which is right through the cliff on which the Mussenden Temple sits.
There are many ways to visit and experience this part of Ireland without having to drive yourself.
Mary.