one of the corcoran inmates we san down with was christian knighten. nobody describes the daily pressures, the ups and downs of being a predator, like he does. >> it's seductive, you know what i mean? you can love the game, but the game loves nobody. you know what i mean? you could sit there and give it your all and think everyone's supporting you, and before you know it, just like that. get your throat cut. seen it, done it. >> knighten was serving time for murder and attempted murder. crimes he committed at the los angeles county jail while awaiting trial on an outside murder/robbery charge that he was convinced would send him to prison for life. but when he went on trial for that original murder charge, something completely unexpected happened. >> they find me not guilty, and it righteously blew my mind. i had to laugh. the irony of it it was classic. >> knighten should have walked away as a free man. instead, he remained incarcerated until he was tried for his jailhouse murder. this time, he was found guilty and given 79 years in prison. but that m

this morning, connor knighten visits the everglade national park. >> reporter: they call it the riverand to truly get your feet wet exploring the everglades, you need to actually get your feet wet. you can't really understand it just by driving by. like you can if you are standing in it. ranger allen scott has been exploring the over 1.5 million acres of south florida's everglade national park for 20-plus years. >> the trees have lost their leaves. but i am noticing the little ones are starting to leaf out. the first national park set aside by national park service, people of the united states for what is alive, the plants, animals and habitats. >> reporter: the different variety of plant and animal life found in the park are staggering. with over 1,000 species of seed bearing plants. and more than 400 species of bird. everglades is an international biosphere reserve. some species like the endangered florida panther are hardly ever seen. and some, like the lovely mosquito can be all too common. if i slap one on my wrist am i going to got a fine from the park service. >> yes, you are.

connor knighten has been taking a tour of some natural wonders you may not know about mike mammoth cave national park in kentucky. >> reporter: there is a lot to see at mammoth cave national park. it's just not always that easy to see it. an entire underground world is illuminated. making. still being formed. a drop at a time to day. located just beneath the hills of south central, kentucky. mammoth cave is mammoth. it is by far the longest known cave system in the world. we discovered more than 405 miles of passage ways. that's twice as long as the second longest cave on planet earth. we could just keep walking forever. >> long before david kim was leaning towards mammoth. early visitors were using their strokes to. >> very, very famous tourist attracts. only the wealthiest people could afford to beep here. so being able to leave your mark and indicate that you were here was a status symbol. privately owned. amtz the cave avenue reputation grew. so did profits. steady stream prompted farmers to take a look at the holes in their backyards. >> you get paid, buying a few lanterns lanterns

connor knighten has been taking a tour of some natural wonders you may not know about mike mammoth cave national park in kentucky. >> reporter: there is a lot to see at mammoth cave national park. it's just not always that easy to see it. add a little light. an entire underground world is illuminated. a world millions of years in the making. still being formed. a drop at a time to day. located just beneath the hills of south central, kentucky. mammoth cave is mammoth. it is by far the longest known cave system in the world. we discovered more than 405 miles of passage ways. that's twice as long as the second longest cave on planet earth. we could just keep walking >> long before david kim was leaning towards mammoth. early visitors were using their strokes to. attracts. only the wealthiest people could afford to beep here. so being able to leave your mark and indicate that you were here was a status symbol. >> at the time, ma'amo was privately owned. amtz the cave avenue reputation grew. so did profits. steady stream prompted farmers to take a look at the holes in their backyards. >> yo

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