Muglins Red, Dalkey Island, Dublin Bay
I love the simplicity of this image and especially the lighting. 
It's lit by the full Moon and this has backlit the islands causing a beautiful silhouette.
If you zoom in or see this image as a large print you can see all the funny shapes of the birds resting on the rocks, Hard to believe as this image is a 15 second exposure using a 200mm lens so the chance of a blurred image are very high.
You know they keep changing the colour of the Beacon, It's Red in this photo but I have others where it's white, Apparently if you are in a boat and navigating white light is safe so you can sail towards it but Red is danger so you sail around until the colour changes....