He did a programme about portmeirion for the BBC around 12 years ago and he came across as a huge fan. We visited in 1994. It's a bizarre place - very ornate and italian looking but it all appears to be made from plywood. The perspectives are odd too - nothing is as big as it looks. Naturally, they trade off the Prisoner connection.
 
Graeme

As far as British oddities go, I immensely enjoyed the Brighton Pavillion - though I doubt you'll find any plywood there. As I remember it, all the ceilings were surprisingly low.
 
Getting off a train at Great Malvern railway station was otherworldly after boarding that same train at Birmingham New Street. And I loved Hereford Hop.