In this seed you spawn in the a flat grass landscape. But if you want to find the main section of this seed you must turn right and cross to the mesa biome. From the spawn if you want to cross the mesa biome you must cross the river, after that you will see first couple of exposed mineshafts. So you can follow that path and get some gold ores. Back to the main section of this seed the dungeon, get out the the mine shafts and try to located the big square crater in the ground. Digging straight down in the white circle in the images below and you will fall down to the dungeon. Likely the other dungeon, you will find some monster spawner and chest with good items inside at the end of the dungeon.
The chest contain:
4 gun powders
Get more details please watch video below:
Seeds : ShiverBurnGalaxyWork in PE ver0.10.0+ or ver0.10.5