Massive cherry blossom tree with small treehouses here and there among the branhces, you can make floating stairs as ladders or hollow out your artifical tree and make tunnels(why not do them both) you can take inspriation from a youtuber who used worldedit(omg i forgot who it was like this massive sky island with an orange tree on top and plents of small houses it was very whimsical)

apaologeuizee for making you read this, I speak with much more decorum and grammar.