Having had the opportunity to stay in Cardiff last weekend, the chance of tracking down some Doctor Who locations was too good to miss. A word of advice - if you fancy doing the same and finding some locations then the various phone apps are all well and good but if, like me, you are looking for some specific places/episodes then http://www.doctorwholocations.net/ is the site you want. You can sort by episode, locations, etc and the site even cross references to give you nearby locations from different episodes.
Our first stop was Llandaff which doubled as Leadworth in "The Eleventh Hour" - interestingly, the back of Llandaff Cathedral was also used as the Church at Auvers for "Vincent and the Doctor". Llandaff itself is lovely - and very easy to find providing you have some kind of reliable satnav. Cathedral Green and Cathedral Lane are the two main locations and as you walk up Cathedral Lane from the Cathedral, you can see Mrs Angelo's house on the left. The Post Office in "The Eleventh Hour" is a fake - and is merely a normal white house. We also found - to our amusement - that the duck pond was also fake. It was built in the top corner of the car park.
For "Vincent and the Doctor", walk down Cathedral Lane and enter the gates to the Cathedral near the bottom. Walk around anti-clockwise - and you'll have to go out into the road and back in again through a gate. Follow the muddy track and you'll come to a small bridge. Turn around to face the Cathedral and you're right where the camera was. It's basically at the back of the Cathedral.
Below are some photos - and screencaps to highlight the areas. The full galleries are on flickr - links at the bottom.
The Eleventh Hour
Vincent and the Doctor