CaveMC is a semi anarchy survival server that feels like vanilla but tougher. The wild part is the entire overworld is underground so there is no surface at all. It is just caves forever with biomes resources and structures all down there.
Season 2 is live with a fresh start and more stuff to do. Survival is brutal and you have to be smart to make it.
They also added a big expansion called the Wasteland Dimension. It has new gear to fight over huge mega structures with secrets and a unique currency that pushes a player driven economy. There is also a new spawn and the dimension uses custom generated terrain with special features.
