Gates, piers, boundary walls and bridge at Castellau Congregational Chapel

The gates, piers, boundary walls, and bridge at Castellau Congregational Chapel form an important entrance to the graveyard and chapel. The Nant Castellau stream curves around the eastern side of the graveyard, creating its boundary. Access is provided by a bridge over the stream, which leads to cast iron gates flanked by piers. Beyond the gates, there is rubble stone walling topped with rendered copings.

The bridge is made of snecked stone and features a single pointed arch constructed with narrow voussoirs and a flat deck. It has continuous parapets and dressed stone saddleback copings. The eastern ends of the bridge are splayed and terminate in square piers set at an angle, each topped with pyramidal capstones. To the west, there are taller dressed stone piers that are surmounted by ornate pyramidal capstones with hollow mouldings. These piers flank double cast iron gates that feature pointed finials and have double top, mid, and dog rails adorned with bands of circles.