This is the world built in the Newbie Squad YouTube series.
For Team M&M, there is a flying sky base.
Team Tree has a giant tree with a sky ship at the top.
Team Poke has a base with an extremely tall smeltery and a high level Ars Magica altar.
NPC Quest at all the base. warps are set up at ever base.
There are also bases for other members of the Newbie Squad that have their own bases all over the Minecraft world.