2. Educational Travel
If learning is a priority for you on a vacation, then look into taking a trip with Smithsonian Travel. They have trips throughout the world, and they're led by experts who will inspire you with the rich history of wherever you travel. Most trips include three meals a day; some may include a couple of days where not all three meals are provided, but admission to museums and so on is all included, and some include airfare as well. Look for so-called "Last Call" discounts on upcoming trips that aren't yet filled. It's a great opportunity if you're retired!