If you find a nice spread of 5-6 rocks on a fairly flat area (usually in the forest/plains/mountains) you can 'create' a cave system if you are careful to not pickaxe the ceiling rocks. I had a network of 7 rocks in the plains, loved my underground throne...even tho I am not a dwarf. Har!

Thus, I present to you Groggenhorn Spire from above and below, where the mead doth flow...

Above the 'linked rock caves' with nice tar roofs for mosquito repelling...
https://steamcommunity.com/sharedfiles/filedetails/?id=2781239276
And below in one of the linked rock caves where I pretend to be Conan pondering his many victories...
https://steamcommunity.com/sharedfiles/filedetails/?id=2781239759
Skal all!