Secret Station 1992 Ellis O’Connell Rover Way, Nr Alexandra Gate, Junction 29 from M4/A48, Eastern Approach to Cardiff Bay To launch its strategy for Public Art in 1991, Cardiff Bay Development Corporation initiated an international competition for artists to design a gateway for the eastern approach to Cardiff Bay.  Six artists were shortlisted and Eilis O'Connell was finally selected to develop and implement her design. This twelve metre high sculpture provides a marker for the approach to Cardiff Bay from the M4/A48M. Twin bronze cones, topped by large steel arcs, stand out clearly against the skyline. Steam is released intermittently, and at night the arcs are outlined by a blue fibre optic light, representing the old and new technologies associated with Cardiff Bay. The title is taken from a line in the poem, "The Diviner" by Seamus Heaney: "Spring water suddenly broadcasting. Through a green aerial its secret stations"