This land mass is known as Castle Ewan and is located in the famous Fairy Glen area on the Isle of Skye. Check out the guy on the top of the "castle". We climbed up there ourselves but didn't stay long as it was very windy and felt a bit unsafe due to the slippy muddy path.
Such a rugged looking climb. At first I wondered if it was person up there, or a tree, or perhaps a cross from an old monastery. After I read your comment, I noticed the other people on the trail.