Episode Four explores the lost village of the Valleys, the old quarrying community of the Llyn Peninsula and the iconic Crumlin Viaduct.

Plus, the volunteers rescuing a sunken WW2 airplane.

Episode Three reveals the lost community in the Brecon Beacons, the Cardiff factory that had a future superstar on its payroll, and the much missed stadium where sporting history was made.

Plus, the iconic Severn Ferry vessel that's been rescued from ruin.

Episode Two explores the lost communities along the Wales Coast Path, the fight to save a Victorian village and the WW2 camp that became a place of safety for refugees.

Plus, the famous toy factory that inspired generations of children.

Episode One explores the Victorian Village demolished to make way for the M4, the architectural gems missing from the North Wales coast and the iconic cinema with a unique link to The Beatles.

Plus, the POW camp that houses an astonishing church, perfectly preserved since the 1940s.