I was testing out seeds today and I ran into a couple of interesting ones. The first one I tried was: cheezwhiz. Don't add the period. It has epic hill generations and two ravines very close to each other. I do have some mods installed so some of the things you see in the pictures aren't there if you don't have the same mods. The second one I tried was: warisgood. Again, don't add the period. You spawn in a jungle surrounded by a desert, a snow biome, and extreme hills.