It's often described as a Swansea Valley town but Ystradgynlais comes within the borders of Powys. Its past however is closely linked with the industrial heritage of South Wales. Click on the links below to find out more.
Take a look at our photos of the views and streets of Ystradgynlais.
have your say
Would you like to help us develop a town site for Ystradgynlais? Do you have memories or photos of local life in days gone by? What do you think of life in the town today? Do you have a story to tell or an event to promote? We want to hear from you about what you'd like to see on these pages. Get in touch with your comments, contributions or suggestions by emailing us at wales.mid@bbc.co.uk.
