If instead of sharing a sailing with thousands of others you prefer something different and more intimate, why not think outside the (cruise ship) box? Here are five ideas to ponder that can take you on journeys on America’s great rivers, on Galapagos and polar expeditions, on off-the-beaten-path Caribbean isles’ explorations under sail, and more. Cruise fares listed are per person, double occupancy, and the best found at each line’s website at the time of writing. Cruise fares are subject to change. Government taxes and fees and airfare to and from port of embarkation are extra. Always inquire if there are any discounts or specials available before you book.