Cardiff in making iron and later steel, brought to the sea by packhorse from Merthyr Tydfil. This was first achieved by the construction of a long canal from Merthyr (510 feet above sea-level) to the Taff Estuary at Cardiff. Eventually the Taff Vale Railway replaced the canal barges and massive marshalling yards sprang up as new docks were developed in Cardiff – all prompted by the soaring worldwide demand for coal from the South Wales valleys. At its peak, Cardiff's port area, known as Tiger Bay, became the busiest port in the world and – for some time – the world's
Cardiff Bay Visitor Centre (The Tube) Cardiff Bay Visitor Centre (The Tube) Cardiff Bay Visitor Centre (known informally as 'the Tube') was a piece of modern architecture designed by the architect Wil Alsop for Cardiff Bay, Wales, in 1990. It was finally dismantled in 2010. A panel of architectural experts has said the building "single-handedly put Cardiff on the architectural map". Architect Wil Alsop was already involved in the development of the Cardiff Bay Barrage when asked, by the Cardiff Bay Development Corporation (CBDC), to design a visitors' centre. The building was completed during the Summer of 1990, located close to the Victorian Pierhead Building. It