Buy 2 Cruises Get 1 Free on Select Back- to -Back Mediterranean Voyages, Combining Three Voyages For an Extended Journey. Or For Shorter Immersions Book a 13 or 14 Night Voyage at and Additional 15% Savings, or a 6 or 7 Night Voyage. Plus Second Guest Sails Free, 50% Reduced Deposits Plus Up to US$1,000 Air Credit