Maen Llia (SN 924 191)
Standing just 60m off the minor road between the Senni valley and Ystradfellte, this is a relatively easy and impressive stone to visit. Made from a massive sandstone block which stands 3.7m high,the task of moving and erecting it must have been a huge challenge, especially as it is likely that a quarter to a third of the whole stone is below ground. On a clear day it can be seen from quite some distance down the Llia valley suggesting that it may have been important as a territorial marker. Standing at an altitude of 573m (1880 ft) it is also thought to be the highest standing stone in South Wales.
Legend has it that the stone goes down to the river, the Afon Llia to drink on occasion. This tale seems likely to be an allusion to the fact that