Allt-y-gest is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Baltic and Tyle'r-bont Quarries is a Site of Special Scientific Interest in Brecknock, Powys, Wales. The site has important sections of Carboniferous Limestone.
Blaen Cilieni is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Blaen Nedd is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Cae Bryn-tywarch is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Cae Llety-yr-efail is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Caeau Bronydd-mawr is a Site of Special Scientific Interest in Brecknock, Powys, Wales. It is a fen meadow, notable for its contrasting neutral and acid grassland areas. The site is under private ownership.
Caeau Cwmcoynant is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Caeau Fferm is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Caeau Llwyn Gwrgan is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Caeau Ty-mawr is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Caeau Ty'n-llwyni is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Blaen-y-cwm Wood is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Coed Dyrysiog is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Coed Mawr – Blaen-Car is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Duhonw is a rural community in Powys, Wales, to the south of Builth Wells, in the historic county of Breconshire. Covering an area of 4,376 hectares (16.90 sq mi) and including scattered farms and dwellings, it is bounded to its north by the Afon Irfon, to its south by Mynydd Epynt and Banc y Celyn (472m) and to its east the rivers Duhonw and Wye. Llangammarch Wells' is to its west.
Ogof Ffynnon Ddu-Pant Mawr is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Pentregwyn is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
Vicarage Meadows is a Site of Special Scientific Interest near Abergwesyn, Powys, Wales.
Y Gors is a Site of Special Scientific Interest in Brecknock, Powys, Wales.
