I have put a lot of work into this and i hope you enjoy exlploring it. Feel free to comment, rate or thumbs down.
You spawn in a room underground and after going up the ladder you will find a huge jungle tree on a small island. There are a few attractions. One of them is Subterranea, My Arena, A small dumb harbor, city in development,and  a...submarine?

Subterranea originally started out as an underground forest and now it has a forest, lake, desert, river and plains. 

WorldEdit was not used in the making of any of these or subterranea.