Wales is a mountainous country with a wet climate and hence home to many hundreds of waterfalls.
Some are popular visitor attractions, many are celebrated in legend whilst others are relatively unknown.
As might be expected in this bilingual country, many waterfalls are known by both English and Welsh names.
'Sgwd' (plural 'sgydau') is restricted to the southern part of mid Wales, notably Brecknockshire whilst 'pistyll' is common in the northern parts of mid Wales.
Ordnance Survey 1:25,000 scale Explorer map series, sheets 151-266