international days in cardiff are just the most fantastic experiences - when all you can see is a solid sea of red down the main streets leading to the stadium, it is fantastic.... music, singing, horns, face painting.....amazing.....
I've been to Cardiff once.. and that once was some REALLY important match they were having. (I don't follow rugby so i have no clue.)
But we were stuck trying to get out of the city for about 4 hours.
It's amazing, with all the fans.. flags... but very scary if your a first time tourist.