Aberlleiniog Castle...

Now owned and maintained by Mentor Mon, this wonderful little castle, which is not the easiest of places to find, is well worth a visit. 2009 saw much restoration being carried out with new pathways and easy access to the top of the mound. It's located in the Penmon area of Anglesey but not that well signposted: OS Landranger map 114: SH616793

Castell Aberlleiniog is the site of a Motte and Bailey, built in the 11th century on behalf of Hugh d'Avranches, the 1st Earl of Chester. Originally it would have been a wooden structure, now long since disappeared, and replaced during the Civil War by a stone structure consisting of a surrounding wall, and archers towers. Even later, during the World War it was used by the Home Guard.

The site is named after the local river, the Lleiniog. Aber means River. Castell of course being the Welsh for Castle. Hence, Castell Aberlleiniog roughly translates into the Castle of the River Lleiniog.