This charming boutique vessel carries just 50 passengers around the Western Isles of Scotland on all-inclusive cruises lasting four to nine nights. (It has the distinction of being chartered twice by Queen Elizabeth II for private vacations to celebrate her birthday with other members of the British royal family.) The ship’s interiors resemble a Highland lodge and are decorated with comfy sofas, framed watercolors, and nautical clocks. There’s also a delightful conservatory and well-stocked library. Unique in the world of cruising, Hebridean Princess offers a relaxing yet invigorating way of experiencing Scotland’s untamed natural beauty.