I've decided to take a trip to Cardiff on an upcoming trip to Europe in September. It will be my first time in Wales. I will take the train from Paddington on a Sunday and spend that afternoon and night there and return the next day. I'm wondering where I should stay and what I should see. I can't walk a lot, but would like to see the castle and take the train trip to Swansea, based on what I've read on here. Should I go to the main station in Cardiff and stay near there? Or is there a better place to stay? I'm looking for a safe hotel, mid range price wise, but I don't know what that would be. I'm not sure what else I want to see, so any suggestions would be welcome. I do like beautiful countryside and interesting sights, possibly colorful and different. Thanks for your help!!