That's the edge of the "Little Orme" headland on the top right.
The photo is a 1.3 second tripod exposure at f16 using a Lee "Big Stopper nd110 on a Nikon 16-35vr lens.
Like what you see here and are interested in photographic composition?.....the blog section of my website now has a complete set of 5 articles covering my personal approach to the subject: Ian Bramham Photography - Blog
For purchasing high quality archival prints of any of these photos you can send me an email by clicking here or by going to my website Ian Bramham - Fine Art Photography where prices are listed in the gallery sections under each individual photo.
19 mm (35mm equiv.)