Alltbreac Broch (Allt Breac, Altbreck)
Not much left of this broch and most of what is left is buried beneath its own rubble. However, there are one or two features visible, including a low stretch of original wall. Checking google earth, you can easily see the remains of what must have been huge surrounding defensive earthworks, so being up on the hill I guess this must have been a military fort.
There is parking (marked on the map), and there is a good path through the woods which takes you right to the broch.
Reproduced by permission of Ordnance Survey on behalf of HMSO. © Crown Copyright. All rights reserved.
Disclaimer: Some brochs were built with military defensive purpose, and as such can be situated in extremely dangerous areas, such as on the edge of cliffs and ravines. Additionally, these are Iron Age structures, most of them in ruins, and they are extremely hazardous, with crumbling stone walls and hidden chambers. Existing walls, lintels, and passages could collapse at any time. The information here is provided free but it is your responsibility to ensure its accuracy, ensure your own safety, and acquire permissions for access where necessary. Accessing brochs is done entirely at your own risk.