The spawn is one of the two survival islands. In the spawn island you can see have one tree, in the underground of the tree is a iron blocks you can get it by digging straight down at the root of the tree. The other island doesn’t have any tree, most of island is sand and flat grass field but if you searching careful you can find an cave system in this island. The cave system quite complex, so we leave it to you, if you find anything interesting you can let us know in your comment.
Seeds : swampseed Work in PE ver0.9.0+ or ver0.9.5