Porth Twyn-mawr

Bay in Anglesey

Wales

Porth Twyn-mawr

Porth Melin Ifan Owen Credit: Alistair Hare

Porth Twyn-mawr, also known as Twyn-mawr Bay, is a picturesque coastal area located on the northern coast of the Isle of Anglesey in Wales, United Kingdom. It sits between the villages of Cemaes Bay and Bull Bay, offering visitors stunning views of the Irish Sea.

The bay is characterized by its rugged beauty, with towering cliffs and rocky outcrops surrounding a sandy beach. The beach itself is relatively secluded, offering a peaceful and tranquil atmosphere for those seeking a quieter coastal experience.

Porth Twyn-mawr is known for its clear blue waters, making it a popular spot for swimming and snorkeling during the summer months. The bay is also frequented by surfers, thanks to the reliable swells that are generated by the Atlantic Ocean.

Nature enthusiasts will appreciate the abundant wildlife that can be found in the area. Porth Twyn-mawr is a designated Site of Special Scientific Interest (SSSI) due to its rich biodiversity. Seabirds such as guillemots and razorbills can often be seen nesting on the cliffs, while seals and dolphins are occasionally spotted in the waters offshore.

Access to Porth Twyn-mawr is relatively straightforward, with a small parking area available nearby. From there, a short walk down a path leads visitors to the beach. While there are no facilities directly at the bay, Cemaes Bay and Bull Bay offer amenities such as cafes, restaurants, and toilets within a short distance.

Overall, Porth Twyn-mawr is a hidden gem on the Isle of Anglesey, offering a beautiful and unspoiled coastal experience for visitors of all ages.

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Porth Twyn-mawr Images

Images are sourced within 2km of 53.161227/-4.4460236 or Grid Reference SH3665. Thanks to Geograph Open Source API. All images are credited.

Porth Melin Ifan Owen

Alistair Hare

View north along Traeth Penrhos

The house is across the Afon Cefni and the Malltraeth Sands at Bodowen.

Mat Fascione

Pen-y-parc headland from Traeth Penrhos

Mat Fascione

Traeth Penrhos

David Medcalf

View to Llanddwyn Island (Ynys Llanddwyn)

A low tide has allowed access to this remote square with distant views to the dark line of Llanddwyn Island (Ynys Llanddwyn), and beyond, The Rivals (Yr Eifl) on the Llŷn Peninsula (Pen Llŷn). Position checked with GPS.

John S Turner

North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (1)

- Pillbox (unclassified): DoB ID: S0003171 On a hilltop in open countryside is a single storey, brick-faced, octagonal plan pillbox with a reinforced concrete roof, and an attached octagonal LAAMG post. Part of the former airfield defences of RAF Bodorgan. SH3767 : North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (2)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (2)

- Pillbox (unclassified): DoB ID: S0003171 View from the LAAMG post showing the attached walled enclosure to the pillbox that provided a protected corridor between the two positions. SH3767 : North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (3)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (3)

- Pillbox (unclassified): DoB ID: S0003171 Unfortunately this is all that remains of the central concrete pillar of the LAAMG position upon which the AA gun was mounted, having apparently been toppled (note the conical top to allow upward traversing of the weapon). SH3767 : North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (4)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (4)

- Pillbox (unclassified): DoB ID: S0003171 Interior view through an embrasure showing the 'T' plan anti-ricochet wall. SH3767 : North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (5)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Trefri pillbox (5)

- Pillbox (unclassified): DoB ID: S0003171 View from the west. SH3968 : North Wales WWII defences: RAF Bodorgan, Anglesey - Hermon pillbox (1)

Mike Searle

Traeth Penrhos

Sand blowing across the surface.

Chris Andrews

Dinas-lwyd

Chris Andrews

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (1)

- Pillbox (unclassified): DoB ID: S0003170 Almost identical to the one at Hermon, it comprises an enclosed circular gun pit, with a crew shelter in the middle, and a hexagonal pillbox with a brick built structure on the roof that was probably an observation post. It differs from the one at Hermon in that the attached gun pit is much deeper externally to allow the structure to be accommodated on the rock outcrop on which it sits, and also the entrance is on the right instead of the left-hand side of the crew room. The vista in front of it is little short of breathtaking with views over the mouth of the Malltraeth Estuary, and Llanddwyn Island beyond. This is the most inaccessible of all the defensive structures at RAF Bodorgan and special permission is required from the Bodorgan Estate in order to visit it. With thanks therefore to Tim Bowie, Estate Manager for arranging access, and to Jonathan Thickett, Estate Warden, for his help in finding other sites, and for the "guided tour". SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (2)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (2)

- Pillbox (unclassified): DoB ID: S0003170 The view of the pillbox from below the bluff. SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (3)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (3)

- Pillbox (unclassified): DoB ID: S0003170 SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (4)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (4)

- Pillbox (unclassified): DoB ID: S0003170 The date '1940' is inscribed on the lintel of an embrasure. SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (5)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (6)

- Pillbox (unclassified): DoB ID: S0003170 The view from the crew room roof over Malltraeth Bay, with in the foreground, the crew room chimney, the northwest facing embrasure of the attached pillbox, and beyond on its roof is the curious brick-built observation post. SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (7)

Mike Searle

North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (7)

- Pillbox (unclassified): DoB ID: S0003170 The circular aperture cut into the pillbox roof gave access to the observation post. Below this can be seen a concrete pedestal in the centre of which is a metal pole. The exact purpose of this is not known, but it has been conjectured that the metal pole may have supported a secondary piece of equipment that protruded into the observation post. It would have allowed its operator to stand on the pedestal below with his head above the roof line inside the observation post. SH3766 : North Wales WWII defences: RAF Bodorgan, Anglesey - Bodowen pillbox (8)

Mike Searle

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Porth Twyn-mawr is located at Grid Ref: SH3665 (Lat: 53.161227, Lng: -4.4460236)

Unitary Authority: Isle of Anglesey

Police Authority: North Wales