Cardiff Bay, also known as Tiger Bay, was once the site of the Butes’ enormous coal empire. It’s now a shiny new harbourside development full of shops, culturally and politically important buildings and tourist attractions. The Wales Millennium Centre, which hosts theatrical and musical performances year round, is worth a visit in its own right: as are the Pierhead Building, the Senned (the Welsh senate) and the immaculate Norwegian Church. There’s also a science museum and discovery centre, a huge open air plaza (the Roald Dahl Plass) and a sizeable shopping quay (the Mermaid Quay). You could spend days at Cardiff Bay and still not have discovered everything!