Torrylin Cairn is the remains of a Neolithic chambered tomb. The cairn has been interfered with by stone robbing and later dumping of field stones and its original shape and size are uncertain. The chamber is 6.7 metres long by about 1.2 metres wide with each compartment about 1.4 metres long. Torrylin Cairn is of a type found across south-west Scotland known as a Clyde cairn, of which a better preserved example can be found at Carn Ban, about 3 miles to the northeast. The tomb would probably have had a crescent-shaped forecourt, framed by a façade of slender upright stones.
Antiquarian excavations in the 19th century uncovered an elongated burial chamber, divided into four compartments. Only the innermost compartment was intact. It contained the remains of six adults, a child and an infant. Beside them lay a flint tool and a fragment of pottery.
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The Broch of Gurness is an Iron Age broch village. Settlement here began sometime between 500 and 200 BC. At the centre of the settlement is a stone tower or broch, which once probably reached a height of around 10 metres. Its interior is divided into sections by upright slabs. The tower features two skins of drystone walls, with stone-floored galleries in between. These are accessed by steps. Stone ledges suggest that there was once an upper storey with a timber floor. The roof would have been thatched, surrounded by a wall walk linked by stairs to the ground floor. The broch features two hearths and a subterranean stone cistern with steps leading down into it. It is thought to have some religious significance, relating to an Iron Age cult of the underground.
The remains of the central tower are up to 3.6 metres high, and the stone walls are up to 4.1 metres thick.