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.
Caeau Blaenau-mawr is a species rich damp grassland that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Caeau Capel Hendre is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Caeau Nantsais are two fields next to a that are a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Caeau Rhyd-y-gwiail is an area of grassland that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Coed Llandyfan is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales. It is an ancient semi-natural broadleaved wood near the small village of Llandyfan, and is 6.7 hectares in extent.
Coedydd Capel Dyddgen is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Coedydd y Garn is an outcrop of limestone that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Cors Farlais is a col that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Corsydd a Rwyth Cilyblaidd is a wetland area that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Craig Ddu–Wharley Point Cliffs are a set of red sandstone cliffs that are a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Crychan Forest Tracks is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales. It was chosen as a special stage in the British Rally from 2006 to 2008.
Dinefwr Estate is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales. Much of the site is a deer park with veteran trees.
Mandinam a Coed Deri is an area of woodland and pasture that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Waun-Ddu is a part of the Mynydd Bach that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Whitehill Down is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Ynys Uchaf is a section of floodplain of the River Gwendraeth that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.
Tregyb Woodlands is a Site of Special Scientific Interest (SSSI) in Carmarthen & Dinefwr, Wales. Designated as a SSSI since 1980 as a conservation effort to protect and conserve the site, its area is 27 hectares.
