The Grotto and Cascade at Compton Castle

The Grotto and Cascade at Compton Castle is an early 19th-century structure that was restored and extended in the late 20th century. It is made from roughly-hewn Hamstone boulders on the exterior and features random rubble construction for the internal walls.

The grotto has a three-tier design with a roughly L-shaped plan. The main part spans the south end of a pond, while a shorter, lower section runs at right angles along the western bank of the lake. It is situated at the head of the valley, at the south end of a series of three fishponds that have three associated lower cascades, which feed into the lake to the north.

The north face of the grotto is designed with three tiers of stepped rockwork. Each tier includes an open-galleried walkway supported by piers made from monoliths or smaller stones stacked together. These walkways offer views of the gardens and access to several small chambers that connect with openings. Some chambers have stone seats, and there are small niches that may have originally held candles. One large chamber on the west side features a rectangular plunge pool, and its dome-shaped roof is adorned with rough pendant rocks that resemble stalactites. Various stairways connect the different levels of the grotto.

At the southern or rear side of the grotto, the ground level is higher, and a low revetment of large stones forms the southern part of the structure. The entrance to a grotto tunnel is located at the south-west corner.

On the north face of the grotto, at the eastern end, there is a cascade that flows from the second tier down a rock channel with uneven stone steps to the pond below. There may have been additional cascades on the north face of the grotto originally, but these are no longer visible.