Abergwyngregyn (known as Aber locally) is located on the banks of the Menai Strait in Gwynedd North Wales. It sits between the towns of Bangor to the west and Llanfairfechan to the east. The village is best known for the magnificent Aber Falls located at the head of the Aber valley just a short walk from the village itself. The waters from the Carneddau range of mountains drop over 100 feet into the beautiful Aber Valley. The valley is popular with nature lovers, walkers and especially bird watchers with a range of birds to be seen including buzzards, falcon, sparrowhawk, ravens, redstart along the woodland edge, and pied flycatcher and wood warbler in the oak woods. Follow the Afon Rhaeadr Fawr toward the Menai Strait and there are an abundance of sea birds to be seen on the Lavan Sands.

Aber itself may not be a two horse town but a two road village is a fairly accurate description. But the size of Aber belies it's historical importance. Aber Garth Celyn as it was known was of great strategic importance as it controlled the ancient crossing point of the Menai Strait via the Lafan Sands to Anglesey. There are important sites in the Aber valley and the surrounding hills showing evidence of occupation from prehistoric times through the Roman period, the Dark Ages and into Medieval times. A walk into the hills reveals Maes y Gaer, a prehistoric settlement, the cairns of Carnedd y Saeson and Meuryn Isaf, the remains of an iron age round house close to the falls, and within the village itself is Pen y Bryn an ancient manor house that was home to Llywelyn, Prince of Wales and Lord of Snowdon