In my world, the main "evil" race lives in a labyrinth like rock formation. They use a method of magic that gives them a hive mind advantage, so they all know how to move around within it. My question is, are there any notable real world geographical formations that could potentially work for this? If not, I'm open to fictional concepts for this.
I recall that in the movie 'The Croods', there is a scene involving such a geography. Based on how basalt columns form, I don't think it would be out of the realm of possibility to use those either.