This trek to these cliffs is just one of the most breathtaking in Ireland. It doesn't even take that long. Maybe 30 minutes to the image of this first viewpoint. The jutting out piece of rock you're seeing is called the sturral and you can hike out on it, but it's not even ground and I'd only recommend to experienced hikers.

This is a great sunset spot.

It is a loop walk you can do here called the Glencolumbkille tower loop walk. It's about 9km, you'll pass glen beach and ascend to as far as you can go really, there's no parking, but a few gaps on the side of the road to leave your car.

The ground is super wet so gortex or waterproof shoes I'd really recommend.