This is one of the nicest survival maps I've generated. It has interesting terrain including two ravines, mountains, several caves, and some smaller islets off the main landmass. It would make a decent pirate base. ;-)
This first image shows the spawn (snow block near the center of the image) one ravine at center left with water falling into it, and the other ravine at the far right center.
This image shows the only five trees the island has.
This overhead view shows the location of spawn (snow block, top center of the island) and the second ravine at the top left.