This is Ralcec. One of the mid sized cities inside of the planet. It's about 5 miles into the crust. So not super deep but definitely deep enough. Ralcec is mostly occupied by only one of Exade's sapient species. Other species live there too but not in the same kind of numbers. This is one of the more barebones types of cities. So there's not a lot in the way of nature preserves or anything. However there is a much bigger city that's not too far away that has tons of that kind of things. 

When you're this far underground there's no natural light. So they've built artificial suns and wrapped their cities around them. It's been working out so far. Although they have to frequently replace the suns. So far they haven't been able to get any of them to last longer than a couple of years. Normally this would be something they could request from other worlds. But with supply chains being what they are these days they've got to work with what they have.