Warehouse Hill Broch
Plenty of archaeology here, and even quite a bit to see poking through the grassy mound. There is even a section of original stonework showing. An interesting aspect of the broch is the Iron Age stone bridge over the burn right beside it, which is still there.
No easy access to this one unfortunately, this is a major trek no matter which route you take. It's rough going too, through heather, moor and bog. This is a serious day out and isn't one for the unprepared. Be sure to have a map and compass with you as well, because if the fog comes down you will be lost without them. Only walkers who understand the moor and know what they're doing should attempt this. I parked at Loch of Yarrows and walked from there, but in hindsight I would choose another route were I to return, as the track to the chambered cairns marked on the map is non existent in many places.
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.