WALES // Raised in purple Welsh sandstone, perched on a lovely limb of Pembrokeshire where Wales looks across the Celtic Sea to Ireland, St Davids Cathedral is immense, its scale way out of proportion to the tiny town surrounding it (the UK's smallest city). This is thanks to the miraculous performances of the local man who became St David - his bones are now behind the High Altar. It became one of Europe's most important Christian sites by the 12th century, prompting Pope Calixtus II to decree that two pilgrimages to St Davids were worth one to Rome.