Back in a day, I worked on a sandy desert oasis. I even put the biome on the front page long picture! (though last time working on a similar biome, the final result ended up a bit different from the original concept shown there and there were only 2 sheets with the theme). Since a few people were asking for some more open fielded map packs - I decided to revive the older idea and make a whole oasis biome.
The map is fairly simple - personally I like to clutter the map with many objects - but I guess things like that add to the variety too. This kind of battlefield center around the few features present on the map and allows snipers to go wild!