Minecraft PE Seed Map: -1038936949
This seed spawns you on a small island, looking at a mega taiga, with icebergs to the left, and a large village to the right. This village also sits above a large cave system with many lush caves and lava pools.
*NOTE: This seed works on 1.17.30 with the experimental Caves and Cliffs toggle turned on. It may not work in beta versions.
When you spawn into the world, you will find yourself on a small island facing towards a mega taiga, with a small iceberg biome to the left, and a large village to the right.
Behind you is a snowy plains biome, which has a snow village in it
From spawn, moving towards the right side of the mega taiga will lead you to the large village. This village sits on the edge of the mega taiga, with half of it sitting inside a snowy taiga. This village also has a blacksmith
This village also sits above a cave entrance, which heads into a massive system of lush caves and lava pools. The entrance is near the church. Be careful as it is a deep drop.
Make your way down into the cave and you should find a view like this:
Here are some more screenshots from inside the cave system: