The Community Council area of Llanfair yn Neubwll includes the villages of Caergeiliog, Llanfihangel yn Nhowyn and Llanfair yn Neubwll.
Llanfair yn Neubwll is situated on the strait opposite Holy Island on the west coast of Anglesey and is a rural community with isolated clusters of settlements. The name means the Church of Saint Mary by the two pools, namely Llyn Dinam and Llyn Penrhyn - both lakes. The area is classified as an Area of Outstanding Natural Beauty.
The village of Caergeiliog is situated on the A5 between junction 3 and 4 of the A55 North Wales Expressway. Prior to the opening of the A55 in March 2001 the A5 was a major route to Holyhead and Ireland. Caergeiliog still has one of the original Anglesey Toll Houses built by Thomas Telford to support the maintenance of the A5.
The third village within this Community area is
Llanfihangel yn Nhowyn which lies
between Llanfihangel yn Nhowyn is home to the
Royal Air Force Station known as RAF Valley,
which is also used as Anglesey Airport. The base
was established on Tywyn Trewan during the
Second World War when large areas of the
coastal sand dunes were leveled to create runways. Silt was dredged from the nearby marches and lakes to spread over the airfields to stabilise the sand from the dunes. Prior to this Llyn Penrhyn and Llyn Dinam were the only major lakes in the area but a cluster of smaller lakes were created during this process. The remaining area of Common Land is now managed by the Tywyn Trewan Board of Conservators.
One of these smaller lakes was Llyn Cerrig Bach where a large hoard of Iron-Age objects was uncovered. These spectacular archaeological finds are said to be one of the most significant in Europe and are now housed in the National Museum of Wales, Cardiff.
Llyn Penrhyn, Llyn Treflesg, Llyn Traffwll and parts of Llyn Dinam are linked by a number of public footpaths and form ‘Valley Wetlands’ which is a Nature Reserve owned by the Royal Society for the protection of Birds.
Much of the reserve is included within two Sites of Special Scientific Interest.