Crosskirk broch (Chapel Pool broch)
Back in the early 1970s the broch was deemed unsafe due to coastal erosion so it was excavated, the remains were bulldozed over the cliff and the site was seeded with grass. There is nothing there today except for a cairn, but I believe you can see some of the original broch stonework in the eroded cliff. I'm not sure about that, but some of the stone does look like it was once part of a broch.
I parked outside the Forss Business and Technology Industrial Park on the grassy verge near a gate making sure I didn't block the farmer's access (see photo below) and walked first to the Tulloch of Lybster broch, then Crosskirk, then walked through the wind turbines along the coast to the Green Tullochs broch. There were plenty of gates and I didn't have any trouble gaining access to any of them.
Reproduced by permission of Ordnance Survey on behalf of HMSO. © Crown Copyright. All rights reserved.
Crosskirk broch photographs
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.