Sitting on the hands is not about us.
We managed to create caves and mines as separate locations where a player can get using an entry switch (technically - a teleport). In the future we are planning to make unique entries for each type of such locations.
Some of them already contain ore deposits, stashes, artifacts etc. The last ones are protected by angriest beasts (for example, a magic golem). DayZ's Navmesh system allows creatures properly move around any room so a golem will be a real threat.
Some places are well-hidden, some of them are located in pretty obvious spots so there is already much stuff to search and explore. The only need is to fill the locations with some more tasty loot.
Also, making a set of models for creating room interiors is in plans. That will allow us to assemble them just like an erector set so that every castle will be an individual location too. It will reduce the load on the server and provide us with a more convenient way to build locations without any physical limits.
To add, we have tried to imitate the river streams. The water is designed to hit the rocks and make splashes creating a relevant sound. So far, this feature is being under consideration and there is a chance for it to either get refined or deleted.
Concurrently the world’s physical map is being designed. It will be one of the in-game items.
That's it for now. Stay tuned!