Few boats are as fun as a sailing catamaran for a week’s charter. Not only is there a sense of intense freedom while being under sail in the tropics, but the beam of the catamaran makes it much easier to spread out and claim a secluded corner. Hemisphere, the world’s largest sailing cat, adds an extra element of size to the equation, thanks to its 145-foot length and 55-foot beam, foredeck trampolines, and luxurious flybridge. A navy of water toys (paddle boards, wind-surfers, small sailboat, tenders for fishing and water skiing, inflatable trampolines, and professional scuba center) allow direct access to gin-clear waters and reefs of the Tuamotus, a remote, 80-island archipelago in French Polynesia where the yacht will be chartering this summer. These islands have untold numbers of white-sand beaches and coral reefs, and the ring-shaped atoll of Taiaro has a coral reef inside a fully enclosed lagoon. It is like cruising in another century. Hemisphere has accommodations for 10 to 12 guests, with 10 crew on board (including a certified PADI instructor). This cat is the ultimate yacht for blending water sports and luxury, while making the most of a beautiful, remote area. Weekly rates are $280,000 through Burgess.