Fed by the boggy uplands to the west of the Elan Valley, the Afon Ystwyth descends rapidly through a wild valley between the peaks of Yr Allt and Esgair Elan.
- Taken: on 6 May 2015
- Postcode: SY23 4AQ
- Nearest place: Cwmystwyth
- Places to stay around Llanidloes
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