I'm a dm and I'm making a physical map to give to my players and I've come across a bit of a wall. I have a dwarven city build into a mountain that has an outer (walled) merchant section. In it, there's a large entrance and a couple of smaller entrances into the mountain itself that leads to a ginormous cavern, which is where the rest of the city and an underground river is. My question is how to visually depict the mountain that the city is built into and separating the the sections, as well how to demonstrate different levels of height within the city, or do I even need to?