Good news for those who like to colour in their Quails, having traversed rare sections of the railway's infrastructure.
Next Sunday will see a unique opportunity to walk across the Knucklas viaduct on the Heart of Wales Line.
Arranged by local user group HoWLTA, in conjunction with Network Rail, tickets cost just £10 and include a vintage bus ride from Knucklas station to site and a numbered souvenir ticket.
More details on how to apply for tickets here.