Canna is littered with numerous pottery sherds evidencing the island's occupation in the Neolithic era, along with a small number of mysterious cellars dug into the ground.
A distinctively shaped standing stone is found at Keill, around which a local legend has grown: according to the legend, when people on Canna were badly behaved, they would be punished by having their thumb jammed into a particular hole in the stone, at about 6'4" above ground level (hence the stone's name - the punishment stone).

Bronze Age remains are some of the most extensive in the North-Western Highlands, particularly at the western end of the island; these include fragments of huts arranged in circles, and ancient field walls, as well as pottery artefacts from the Beaker Culture.
In the Iron Age a hillfort - Dun Channa - was constructed at the far western edge of Canna; another was probably constructed at the eastern edge, at Coroghon, in the same period.
Canna is littered with numerous pottery sherds evidencing the island's occupation in the Neolithic era, along with a small number of mysterious cellars dug into the ground. A distinctively shaped standing stone is found at Keill, around which a local legend has grown: according to the legend, when people on Canna were badly behaved, they would be punished by having their thumb jammed into a particular hole in the stone, at about 6'4" above ground level (hence the stone's name - the punishment stone).
Bronze Age remains are some of the most extensive in the North-Western Highlands, particularly at the western end of the island; these include fragments of huts arranged in circles, and ancient field walls, as well as pottery artefacts from the Beaker Culture. In the Iron Age a hillfort - Dun Channa - was constructed at the far western edge of Canna; another was probably constructed at the eastern edge, at Coroghon, in the same period.
Canna, Scotland