Cardiff Bay has become the ultimate tourist destination for anyone visiting the capital of Wales. It is very easy to reach by public transport and not too expensive by taxi either. A train runs regularly from Queen Street Station in the city centre. The journey lasts 3 minutes and runs all day. Alternatively, you can get the bus.
The blue bendy Baycar runs from the city centre every 15 minutes during the day and 30 minutes in the evening.
City Circle number 2 runs from the city centre to Mermaid Quay Monday to Saturday.
Number 7 runs from Canal Street to either the Millennium Centre or Mermaid Quay Mondays to Saturdays.
Number 8 has the most frequent buses, approximately every 10 minutes, and runs seven days a week, including bank holidays.
Cardiff Bay has a long history. Originally known as Tiger Bay and most famous as the birthplace of Dame Shirley Bassey, it was once a thriving port, exporting coal from the mines. It was also increasingly multicultural, with an estimated 57 nationalities living in Butetown during the 1950s. Tiger Bay had its seedy reputation, but gradually the close-knit community was torn apart by slum clearance. By the 1980s, the bustling port was virtually silent so plans were drawn up for regeneration. Out went Tiger Bay, in came the swanky Cardiff Bay, home to the Millennium Centre, Welsh Assembly, BBC Cymru and (until September 2017) the Doctor Who Experience. Mermaid Quay incorporated part of those docks, as well as creating wetlands further along the River Severn, a 500 metre freshwater lake as well as shopping and numerous dining options. Meanwhile the port is now part of ABP South Wales which operates a couple of docks near the BBC studios. The occasional small cruise ship docks here.