After spawn, you spawn close by a village with surrounding area is mostly plains, some extreme mountains and lavafall. In the center of village you will find a well, jump into the water following the path tunnel in the well as soon you will drop into the stronghold. In there, you will find some chest contain good items and end of portal room.
Seeds : Hashtag WHAT??? Work in PE ver0.10.5 or ver0.11.0+