This intractable is about 3 cool seeds that I found.Hope you enjoy.
Step 1: Deserted Islands
Seed name - padi
This is a good island for survivalists because there is not a lot of rescources
Step 2: Multi Level Cliffs
I like this seed because if the different levels you have.This could be really good for an abandoned city look.
Step 3: Mountainous River Area
It is really cool how the river is cut into the ground with mountains and cliffs around it. It could make a cool base.