Mynydd Llangyndeyrn
Mynydd Llangyndeyrn is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales, and a hill reaching 263 metres, which is a Marilyn.
Mynydd Llangyndeyrn and the SSSI are located west of Drefach and north of Pontyberem. The SSSI is approximately east-west and north-south, taking the approximate shape of a horns downwards shallow crescent.
The SSSI citation for Mynydd Llangyndeyrn specifies that it is "notable as one of the larger upland semi-natural areas left in south-west Wales which, unlike most others, remains lightly grazed." The site features marshy grassland, wet heath, and dry heath, and hosts the marsh fritillary butterfly.
