one of my favourite cathedrals in the uk would have to be St. Alban's - in fact, the entire town is quite lovely. the town of St. Albans was about 20 minutes from my old home in the uk.
the altars, stained glass and shrines stand out with their rich history.
here are a few of my favourite images, take from the site
the high altar
St Alban from a window in the Lady Chapel by Charles Kempe (Edgar Carter) 1885
more information about the cathedral and the history of St. Alban can be found at http://www.stalbanscathedral.org.uk