CaveMC is a semi anarchy survival server that feels like vanilla but turned up. The whole overworld is underground so there is no surface at all. It is just caves forever with biomes resources and structures.
Season 2 is live so it is a fresh start with a bunch of new stuff. Survival is brutal and you really have to figure things out if you want to last.
There is also a Wasteland Dimension opening on November 8th. It has new gear to fight for huge mega structures with secrets and its own currency for a player driven economy and trading. It also comes with a new spawn and a custom generated map with special features.










