35:. The name means 'slab stream', presumably in reference to the sandstones across which it runs. Its headwater streams, the Nant Llech Pellaf and the Nant Llech Isaf join forces at Blaen Llech and then continue westwards as the Nant Llech for 3 km / 2 mi to a confluence with the
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A public footpath runs the length of the valley though part runs across a landslip area which has been active in recent years. The river gorge is a
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63:' into a deep plunge pool. The river continues below in a steep wooded gorge cut into mudstones and sandstones of the
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59:), a 27m/90 ft high fall where the river plunges over the edge of a band of hard sandstone known as the '
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discovered some fossil trees near the base of the falls. These are now on display outside
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British
Geological Survey 1:50,000 sheet 231 'Merthyr Tydfil' & accompanying memoir
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Ordnance Survey
Explorer map OL12 'Brecon Beacons National Park: western area'
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which provides a free car park off the minor road between
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and Pen-y-cae for visitors wanting to explore the area.
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188:Rivers of the Brecon Beacons National Park
71:. The falls are owned and managed by the
51:The most famous feature of the river is
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55:(Sgwd Henrhyd or Rhaeadr Henrhyd in
84:site of special scientific interest
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31:and which lies wholly within the
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39:just east of the village of
33:Brecon Beacons National Park
92:Geological Survey of Canada
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90:, first director of the
16:River in Powys, Wales
88:William Edmond Logan
23:is a minor river in
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159:51.8014°N 3.6921°W
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164:51.8014; -3.6921
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69:Coal Measures
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65:Carboniferous
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61:Farewell Rock
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53:Henrhyd Falls
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183:Fforest Fawr
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177:Categories
147:51°48′05″N
102:References
37:River Tawe
21:Nant Llech
150:3°41′32″W
47:Waterfall
77:Coelbren
41:Abercraf
86:. Sir
57:Welsh
29:Wales
25:Powys
67:age
19:The
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