Birdwatching in the wetlands: Down in Cardiff Bay, the 20ac Wetland Centre is home to more than 50 species, including resident grey herons, coots and kingfishers, plus migratory birds like swifts, warblers and in winter, starlings.
Walk the Cardiff Bay Barrage: This phenomenal bit of engineering is well worth having a wander along; the beautifully landscaped embankment manifests lock gates, sluices, a fish path and stunning views; there’s a good kids’ play area and skate park too.
Cycling: Pedal Power offers an excellent bike-rental scheme with outlets at Cardiff Caravan Park and at a kiosk just beyond the Norwegian Church in Cardiff Bay. For a lengthier outing, the Taff Trail runs from the city centre all the way to Brecon, following the path of the River Taff.