Crumlin Navigation Colliery

The Navigation colliery is a nationally important, nearly complete, complex of both Grade II* and II buildings. Listed buildings in the complex include the winding engine house, colliery baths, and chimney. Built in the early 20th century, Navigation Colliery was one of the earliest collieries in South Wales to be built in brick rather than local stone and was a show-pit of the period with high quality buildings and up-to-date machinery. The pit closed in 1967 and has been disused ever since. In 2009, a proposed redevelopment as housing fell through due to the financial crisis. Local community group, GLOFA Navigation Cyf, now plan to restore the buildings for commercial and community use, creating jobs and an education centre as well as green electricity generation. However, turning Navigation Colliery into a hub for the community once again seems a long way off without the necessary funding to address the pollution rising from the former mineshaft and a collapsing culvert beneath the main access road.

South Wales also featured in 2013's Top Ten when Swansea's Palace Theatre was listed. There has been some good news for the theatre since then as Swansea Council has offered a grant of over £70,000 for repair works, subject to the owner obtaining three quotes for having the work carried out. Sadly, the building's owner has not as yet been able to provide these quotes and the building remains in danger.

Other Welsh buildings nominated by the public for inclusion in the Top Ten included Plas Gwynfryn, Llanystumdwy, where Gwynedd Council are reluctant to use their powers against an offshore owner, and the former Market Hall, Stanley Street, Holyhead where the owner is refusing to sell to the Council.