Bryn Gwyn stones

Castell Bryn Gwyn is a prehistoric site on the Isle of Anglesey, west of Brynsiencyn. It is a circular clay and gravel bank covered with grass, still some 1.5 metres (5') high and revetted externally by stone walls, which surround a level area some 54 metres (177') in diameter. Its name means "White Hill Castle".The original use of this site is uncertain although it may have been a religious sanctuary. Later Neolithic pottery indicates use in this period, and it may have been a henge monument at this time. The earliest bank and ditch belong to the end of the neolithic period (2500-2000 BC). During the Iron Age, the present wall was built, and it was refortified in Roman times and later.Parking is exiguous; the site is accessible from the A4080 by a footpath. Another path follows the low ridge, southwest over stiles to the Bryn Gwyn stones, or northeast, past the site of the former stone circle of Tre'r Dryw Bach, some ½ mile (800 metres) to Caer Lêb where it meets a minor road with limited parking space.

Bodrida is an insular hamlet in the community of Rhosyr, Ynys Môn, Wales, which is 126 miles (203 km) from Cardiff and 210 miles (340 km) from London.

Bodowyr Burial Chamber is a Neolithic burial chamber made of a few large stacked stones (also known as a dolmen or a passage grave) in a farmer's field on the north Wales island of Anglesey. It is located at Bodowyr Farm, 1.25 mi (2.0 km) east of Llangaffo, off the B4419 road.

Caer Lêb is a Roman and mediaeval site on the Welsh island of Anglesey, west of Brynsiencyn. Its name means "Leaven Castle". It is a low-lying site near the Afon Braint with a double row of pentangular banks (some parts now levelled) and marshy ditches. The original entrance was on the east, other gaps are modern and caused by animals. Based on the excavation of a similar site elsewhere on Anglesey, it may date from the 2nd century BCE.Excavations in 1865 found structures within the enclosure, rectangular buildings on the east and a circular one on the south. Nothing of these can now be seen on the ground. Pottery from the 2nd century to the 4th century was found, and on the north side a layer of periwinkle shells and a mediaeval coin, under a layer of peat.There is a parking area, sufficient for 4-5 cars, by the roadside. A footpath goes southwest on a low ridge, some 2 metres above the Afon Braint, from Caer Lêb over stiles, past the site of the former stone circle of Tre'r Dryw Bach, some 800 metres to Castell Bryn Gwyn and on to the Bryn Gwyn stones and the A4080. 500 metres north-west along the road, by Pont Sarn Las (Green Causeway Bridge), the foundations of three round houses may be visible after a dry summer. A large settlement was recorded in the 19th century, and destroyed in the 1870s by agricultural improvement.

Dwyran is a village on the island of Anglesey, in north-west Wales, in the community of Rhosyr. Population 2011 census was 603. The first prototype Land Rover off-road vehicle was built Dwyran in 1947.

Llanfair-y-Cwmwd (or Llanfair-yn-y-Cwmwd) is a village in the community of Rhosyr, Ynys Môn, Wales, which is 126.5 miles (203.5 km) from Cardiff and 211.4 miles (340.2 km) from London.

St Mary's Church, Llanfair-yn-y-Cwmwd is a small medieval parish church near the village of Dwyran, in Anglesey, north Wales. The building probably dates from the 15th century, with some alterations. It contains a 12th-century carved stone font and a 13th-century decorated coffin lid. The bell is inscribed with the year of its casting, 1582. The historian Henry Rowlands was vicar of St Mary's in the late 17th and early 18th centuries. Maurice Wilks, who invented the Land Rover, is buried in the churchyard. Although at one time during the 19th century St Mary's was too dilapidated to permit services to be held, repairs were carried out in the 19th century. The church is used for worship by the Church in Wales, one of five in a combined parish. Services are held once per month between April and September. St Mary's is a Grade II* listed building, a national designation given to "particularly important buildings of more than special interest", in particular because it is regarded as "a good example of a simple, substantially unaltered, late Medieval church". It is also said to be "an important survival" because many of the older churches in Anglesey were extensively rebuilt or repaired during the 19th century, and the alterations at St Mary's were less extensive.

Perthi-Duon Burial Chamber is a Neolithic dolmen located to the west of Brynsiencyn, Anglesey, Wales.

The Anglesey Sea Zoo (Welsh: Sw Môr Môn) is an aquarium and independent research and marine education centre on the south coast of Anglesey island in North Wales. Located just outside the village of Brynsiencyn, Anglesey Sea Zoo claims to be the largest aquarium in Wales and displays over 150 native species.

St Caffo's Church, Llangaffo is a 19th-century church, in the south of Anglesey, north Wales, about 5 miles (8.0 km) from the county town, Llangefni. It was constructed in 1846 to replace the previous medieval church in the village of Llangaffo. The new building includes a number of monuments from the old church, and has a spire which is a prominent local landmark. The churchyard has part of a stone cross dating from the 9th or 10th century, and some gravestones from the 9th to 11th centuries. It is dedicated to St Caffo, a 6th-century martyr who was killed in the vicinity. The church is still in use as part of the Church in Wales, one of four churches in a combined parish. It is a Grade II listed building, a designation given to "buildings of special interest, which warrant every effort being made to preserve them", in particular because it is regarded as "a mid 19th-century rural church, consistently articulated and detailed in an Early English style".

Llangaffo is a village in Anglesey, in north-west Wales. It lies along the B4419 and B4421 roads, north of Dwyran, south of Gaerwen and northwest of Llanidan. It is named after Caffo, a 6th-century saint. A church, St Caffo's Church, is named after him. A war memorial, a village hall and a primary school are also located in the village. The 1851 census recorded 138 people in the village, 75 males, 63 females and a parish area of 1,590 acres (640 ha). It is in the community of Rhosyr. The 2011 census recorded a population of 357.

Llanidan is a community in the south of Anglesey, Wales which includes the village of Brynsiencyn (Welsh pronunciation). The parish is along the Menai Strait, about 4 miles north-east of Caernarfon (across the strait). The parish church of St Nidan is near the A4080 highway, a little to the east of Brynsiencyn. The ruins of an earlier parish church survive.