Part of the half-mile loop at this zoo is a treetop boardwalk that allows you to traipse above fields of reindeer and other hoofed animals. You can touch the Asian elephants, which have been bred here for decades. Sand cats, ocelots, meerkats, penguins, red pandas, and Amur tigers reside here, too, along with hundreds of other animals. A reptile house and a free-flight aviary are among the...