| Site of Special Scientific Interest | |
  Location within Wales | |
| Location | Carmarthen |
|---|---|
| Grid reference | SN4812023870 |
| Coordinates | 51°53′33″N4°12′31″W / 51.89263°N 4.2085591°W |
| Interest | Biological |
| Area | 1.65 ha |
| Notification | 12 June 1984 |
Cae Cwm-tywyll is an unimproved hay meadow that is a Site of Special Scientific Interest in Carmarthenshire, Wales.
Moelwyn Mawr is a mountain in Snowdonia, North Wales and forms part of the Moelwynion. Its summit overlooks the Vale of Ffestiniog and has views in all directions.
Coed Nant Menascin is a Site of Special Scientific Interest (SSSI), around the Nant Menasgin, near Llanfrynach in the Brecon Beacons National Park, Powys, Wales.
Cae Gwynfryn is an unimproved grassland that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Cae Maes-y-ffynnon is a wet unimproved pasture that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Cwm Crymlyn Road Section is an exposed area of Tremadoc rocks that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Cwm Twrch is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales.
Cwm yr Abbey Stream Section is an locality of Arenig faunal and stratigraphic significance. It is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Coed Cwm Clettwr is a Site of Special Scientific Interest in Ceredigion, west Wales. It is designated for mature broadleaf woodland.
Cwm Doethie – Mynydd Mallaen is a Site of Special Scientific Interest in Ceredigion and Carmarthenshire, mid Wales. Contained within it is the Allt Rhyd y Groes national nature reserve designated principally because of its sessile oak woodland clinging to near vertical cliffs of the River Doethie gorge.
Cwm Cadlan is a Site of Special Scientific Interest in Glamorgan, south Wales. It is made up of a series of wet grassland fields in a small valley to the north west of Merthyr Tydfil. It is also designated as a Special Area of Conservation (SAC) and a National Nature Reserve (NNR).
Cwm Du Woodlands is a Site of Special Scientific Interest in Bridgend, south Wales.
Cwm Glo a Glyndyrys is a Site of Special Scientific Interest in Merthyr Tydfil, south Wales.
Cwm Taf Fechan Woodlands is a Site of Special Scientific Interest on the northern outskirts of Merthyr Tydfil, in south Wales. It has semi-natural broadleaved woodland, with a variety of plants, some of which are rare. The 60.9 hectares site under protection is dominated by oak, ash, downy birch, and hazel and hawthorn. The Taf Fechan river flows nearby.
Cwm Dewi is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 2010 in an attempt to protect its important geological elements. The site has an area of 22.02 hectares and is managed by Natural Resources Wales.
Cwm Clydach is the name of a Site of Special Scientific Interest in Carmarthenshire, Wales. The site is located 4 kilometres from the coast and the town of Kidwelly.
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