WHEN IT COMES TO EXPLORING THE WORLD’S MOST REMOTE AND WILD PLACES, “ultra luxury” is rarely found anywhere in the guidebooks or marketing materials. For the most part, intrepid globetrotters have shrugged their collective shoulders and accepted the notion that one usually must forfeit comfort in favor of adventure. Yet Seabourn Venture turns that long-held belief on its head; the ship is essentially a floating five-star resort.