and now greg carr has something to show the world.resist a return to gorongosa when carr sends out invitations like this. >> just come and sit at a sunset by the lake in the center of this national park. i mean, time stops. and you get 100 colors of yellow and 100 colors of orange, and then the dusk sets in. and then a flock of birds go over the water, and there's a hippo over there making a noise. and there's an impala over there. and, you know, it's like, well, i could have been here 100,000 years ago, and it might have been the same. >> reporter: greg carr's wonder is almost like disbelief. a million acres of africa reborn. >> when i first came here in 2004, i could drive around with my mozambican friends all day long. and if we were lucky, maybe we would see one baboon or one warthog or something. now we drive around, and it's an ocean of wildlife. come around the corner, there's a herd of elephants. go the other direction, there's some lion cubs. 10,000 waterbuck. and i say to myself, you know what? nature can rebound. >> reporte