Browsing this morning I came across the four archaeological trusts that cover Wales, loads of fascinating reading but the two links below are 'Walker Leaflets' for my favourite part of Wales; Useful for Gladman, Sweetcheat and Postman. I'll put up the four links to the trust elsewhere though...

http://www.dyfedarchaeology.org.uk/walkerleaflets/mynyddcarningli.pdf

http://www.dyfedarchaeology.org.uk/walkerleaflets/preseli.pdf