Greentulloch,broch 180m NE of

The broch has a diameter of about 17.0 m. Its entrance, with a surviving lintel and part of the wall, is preserved on the south-east side. The remains of the broch form the core of a mound about 23.0 m in diameter and 1.5 m high. The mound probably consists largely of rubble from the broch and may contain further remains of the outer wall. The bank that bounds the mound on the south-west is probably a remnant of the outer defences.

The Clyde tomb, Achnagoul 2, is a heavily robbed cairn crossed by a destroyed field wall. It lies on a slight rise in a clearing and measures about 18 × 12 m and 1.2 m in height. A concave forecourt lies on the north-east. Its two outer stones and three further stones of the exedra stand up to 0.85 m above the level of the forecourt, and they remain in situ, as does one of the two portal stones. The top of the portal stone is 1.35 m above the floor of the unroofed chamber, which is entered from the middle of the exedra. A sill stone lies immediately behind the portal stone.

Each side of the double chamber is made of three slabs. The central slab is wedged against the dividing slab and overlaps its neighbours to support the side slabs. The dividing slab separates the chamber into two compartments, each about 0.8 m deep. The outer compartment is rectangular in plan and the inner one is trapezoidal. A narrow end slab closes the chamber. The stones on the south-east side seem to have been slightly displaced. A slab lying beneath the dividing slab may indicate that the floors of the compartments are paved.

The standing stone is oriented roughly north to south and stands on the crest of a low rise. It is about 1.5 m high and 1.2 m wide, and 0.8 m thick at ground level before it narrows to a flat tip 0.6 m wide. It has been suggested that the stone formed part of a circle, but irregularities in the immediate topography make this unlikely, and there is no evidence that stones were removed. Seven recumbent stones lie near it, and a survey showed that all eight stones lie on an ellipse measuring 63.0 × 88.0 m. A column-like stone 2.9 m long lies about 23.0 m to the south-east beside the fence. It is at least 0.4 m thick and tapers from 1.0 m wide to 0.7 m.

A broch is an Iron Age hollow-walled drystone tower found in Scotland, which holds more than 500 of them. There are approximately 571 candidate sites, concentrated in northern Scotland, with the densest groups in Caithness, Sutherland and the Northern Isles.