san antio. when y you think about that elevaononal range,, which is s the greatate elevational rangnge of any couny in the united ststates, there'sa divererse suite of habitatsts in theere, and that includudes habitat that might be right along the busiest freeway in the country...but it also includes places where mountain lions live. i mean, it's just this place of absolutely incredible diversity when it comes to thinkininabout types of f habitat and types of species that are thriving hhere. man: hey, i thought i told you guys to get out of here. now, go. come on. get out of here. male reporter: we have a mom and her kids all going for a nice, refreshing swim all at the exact same time. woman: there is a hidden jungle in cities like los angeles, and a hidden savannah and hidden wetlands, and other kinds of ecosystems.. pauly: there's no magic line where nature stops and city begins. it's all a giant matrix. and in the most urbanized parts of los angeles, you can still find literally thousands of