Former Hospital and boundary walls

The former hospital is a plain classical-style building dating from the 19th century. It features a two-storey, three-bay central section flanked by single-storey, three-bay wings. The structure is built of snecked rubblestone with tooled granite quoins, door and window surrounds that include keystones and a chamfered plinth. The slate roofs have deep bracketed eaves, plain bargeboards, and integral end stacks with tall octagonal stone shafts, arranged in groups of four for the main range and a single stack for each wing. The main range has a cross gable topped with a simple finial and a blind attic roundel. The windows are recessed horned 16-paned sash types, and the central entrance features panelled half-glazed doors. The single-storey wings, which are slightly set back, also have 16-paned sash windows, with the right section having unhorned windows. There is a panelled basement door in the gable end of the left wing. The rear elevations of both wings include roundels and sash windows, with a lean-to at the back of the left wing that has sash windows on the right. The cross range at the back of the central section has small-paned sash windows and panelled doors on each side, along with round-headed windows in its rear gable end.

The retaining boundary wall in front of the forecourt features iron railings with spearhead finials, while a high revetment wall is located at the rear. The museum interior is displayed and interpreted to the public as a 19th-century quarry hospital. Inside, there are half-glazed inner doors in the central hall framed by classical pilasters. The original twin porcelain basins in the operating theatre are equipped with brass taps, and much of the functional furniture was crafted in the quarry workshops. A relocated slate fireplace, featuring astrological carving by Thomas Jones and dated 1837, is also present, along with an arched opening off the central corridor.