South Stack sits on the far western edge of Anglesey, where steep cliffs plunge into the Irish Sea and waves crash far below. It’s one of the island’s most dramatic landscapes and a key location for seeing puffins during the spring and summer months. From May to July, puffins nest among the grassy slopes above the cliffs, while the ledges are crowded with guillemots, razorbills, and kittiwakes.

The RSPB reserve at South Stack provides well-maintained trails, information panels, and viewing areas, including Ellin’s Tower, which offers sheltered seabird watching with telescopes and displays. The walk down to the iconic South Stack Lighthouse takes you down 400 stone steps and across a narrow bridge, offering breathtaking views (and a steep climb back up).

There’s a car park, café, and toilets near the visitor centre, making it a convenient spot for a longer visit. The light and landscape here are perfect for photography, especially at sunset when the cliffs glow and the seabirds are still active. South Stack combines wildlife, history, and sweeping views, making it one of the best all-round puffin-watching spots in Wales.