Geograph - photograph every grid square

The little triangular building on the corner, right, is The Old Smithy and used to house the local cable relay company Wright's Radio Relay which switched off its service in April 2017. Probably one of the UK's earliest cable TV companies, it was launched in 1959 by local retailers who wanted to sell televisions in an area where receiving a TV signal was not possible for many houses because of the surrounding hills.
The four-storey building beyond it is The Barracks, built in the 1820s as part of the development of the Penygloddfa weaving district. The lower two floors provided back-to-back housing for six families, with weavers' workshops on the upper two floors. It acquired its name in about 1837 when it was occupied by the Army following the Chartist disturbances. The building has since become 1, 2 and 3 Hafren Cottages.
Info from Coflein: Link
The building on the left is part of the Llys Glan Yr Afon development.