St Louis has the best zoo in the country. It is every bit as good as the San Diego zoo and the best thing about it is that there is no (as in nada) admission fee. With little ones, this is awesome because you don't feel the need to stay all day. We cruised the zoo often and in small increments. Check out all this horsing around or maybe it is hippo-ing around. HA HA I totally love the STL skyline that was added to this page.