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 Police Station in front of the main steps of the police station at a cost of £75,000, making it the most expensive piece of art paid for by any UK police force in the previous five years. The new police station has 60 custody cells spread across three wings, with access to natural daylight via solar tubes. There are also 11 interview rooms and state-of-the-art recording and security equipment. Cardiff Bay Police Station Cardiff Bay Police Station (which replaced Butetown Police Station) is the South Wales Police Eastern Division area headquarters and custody suite, located on James Street, Cardiff, Wales. Butetown Police