The small town of Kidwelly, at the mouth of the River Gwendraeth Fach, is dominated by the impressive pigeon-inhabited remains of Kidwelly Castle, a forbidding grey eminence that rises above a narrow waterway dotted with gliding swans. It was founded by the Normans in 1106, but most of the system of towers and curtain walls was built in the 13th century in reaction to Welsh uprisings. If it looks at all familiar, that may be because it featured in the opening scene of Monty Python and the Holy Grail .
Trains head to Kidwelly from Carmarthen (£3.60, 16 minutes) and Swansea (£6.60, 34 minutes).
