You spawn on a side of the mountain. From the spawn just walk straight ahead a few minutes then you will reach to the multiple of extreme mountain and hill look very nice and cool. You can using creative mode to looking this in bird view. It’s look so amazing. You can see them in the images below . The mountain likely touching to the sky…. Moreover, not only extreme mountains and hills in this seed also have waterfalls and lavafalls you can see them after few minutes explore this seed.
Seeds : 1418837699 Work in PE ver0.10.5 or ver0.11.0+