This seed generates some very epic mountains and overhangs around the area at (x=-400, z=-300). Slightly further away at (x=-1300, z=-380) there are even more incredible mountain formations.
Minecraft Seed: 1488377244
Kylehampton on reddit discovered this seed with some incredible scenery around the spawn point. There is even a spider dungeon embedded in the side of a mountain at (x=75, z=-100).
Minecraft Seed: -6995905040429265278