Cities can often be expensive and Boston is not exception. However I am happy to say that there are a number of things you can do in Boston for free or for very cheap! I love seals so it should come as no surprise that I love the New England Aquarium. What I don't love is their very expensive price for entry. Lucky for me you can stand outside and watch the seals swimming and playing for hours at a time, for FREE! Last time Rick and I were even lucky enough to catch a training session and learn some more about my favorite pinipeds, the Harbour Seal!