Nawr eich bod wedi darganfod rhai mannau diddorol yn y 13 gwlad, beth sy'n rhaid gwneud i atai twristiaeth dorfol rhag dinistrio harddwch a chymeriad cyrchfannau o'r fath?
Now that you have discovered some interesting places in the 13 countries, what must be done to prevent mass tourism destroying the beauty or the character of such destinations?