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 The Pont y Werin pedestrian and cycle bridge opened in July 2010, completing a six and a half-mile circular route around Cardiff Bay and Penarth. A cycle hire system, similar to those in other large cities, launched in September 2009, and includes 70 bikes and 35 hire points (initially seven) around the centre and the south of the city. The current stations are: Central Station; Cardiff Bay Station; County Hall; Cardiff Bay Visitors’ Centre; Churchill Way; City Hall and eastern Queen Street. It is necessary to register before using bike. The first half an hour is free after which a