Here's the Queen o'the Isles, Westray lies North from Orkney Mainland, a beauty to explore.
The best place in Orkneys to see Puffins (Castle O'Brian), the best of the Orkneys' lighthouse (the gorgeous Noup Head Lighthouse), and not to mention last ... the best fish and chips in the UK (at the PIerowall Hotel. ps. it's true). Add a peaceful township (Pierowall) with an ancient castle, rich neolithic evidences (here was found the Westray Wife), a nearby lovely Island with a great nature reserve (Papa Westray) and You'll have the best Island to visit of all the Orkneys.