The Cwm Twrch television relay station is sited on high ground to the southeast of the village of Upper Cwm Twrch in the upper Swansea Valley.
Twrch Trwyth | Pobol y Cwm | Cwm, Llanrothal | Ysgol Gyfun Cwm Rhymni | Llyn Cwm-y-ffynnon | Cwm Twrch | Cwm Penmachno | Cwm Idwal |