Wales has about 5 million people, but most of them live in the South, near the M4 corridor. (The M4 being the motorway from London, past Cardiff, into Carmarthenshire.) In size, Wales is about 20,000 sq km (10,000 sq m). A growing minority of the Welsh speak Welsh.

WRT Llanfairpwll (as it is abbreviated), although the name /does/ have a meaning in Welsh, it was, IIRC made up in the 19th century to encourage tourism. And from what I've heard, the name is the most interesting thing about the town by a fair margin.