The Welsh name of Puffin Island -- Ynys Seiriol -- refers to St. Seiriol, who established a monastic settlement on the island and on the mainland opposite the island in the 6th Century. St. Seiriol is said to have been buried on the island and perhaps also King Maelgwn Gwynedd, who was the ruler of North Wales and patron of St. Seiriol in setting up the religious community.
A monastery existed on the island as late as the late 12th Century, and a number of ruins of medieval monastic buildings, including the tower of a 12th Century church, still exist. Today, the island is uninhabited and requires special permission to visit, but it may be seen from Penmon Point along the Anglesey coastline.
About Puffin Island (Ynys Seiriol)
Wikipedia: Puffin Island (Anglesey)
Journey to Puffin Island (Ynys Seiriol)
Puffin Island (Ynys Seiriol) is located off the northeast tip of Anglesey (Ynys Mon) in North Wales.
Anglesey History: Holy Penmon
Ordnance Survey Map (SH6481982129)
Visitors information for Puffin Island (Ynys Seiriol) may be found at the geograph.org.uk website. General tourist information for the area may be found on the Visit Anglesey website.
Additional Photos of Puffin Island (Ynys Seiriol)
Road from Penmon Priory to Puffin Island, Site of Another of St. Seiriol's 6th Century Monastery
Lighthouse and Puffin Island
Puffin Island and Great Orme Mountain (right)
Close-Up of Puffin Island
Puffin Island (Across Conwy Bay from the Great Orme Mountain)