Find out about the famous diva Adalina Patti and the children of the Criag Y Nos TB Hospital by joining the daily History Tour.
Normally costing £10, but free to people staying in the Castle or the Nurses block Bunkhouses, the tour takes you into the ruined upper floors of the castle, the preserved Adalina Patti theatre and onto the roof with stunning views of Brecon Beacons.
Find out more about Craig Y Nos Castle