So there are a lot of dungeon crawlers and city building/management games out there. But are there any games that combine theese two genres?
What I am looking for is a game in where the players venture out to explore caves, mines, castles and inbetween these adventures the players build a town or city. Which means the players need to gather resources and maybe need to defend their camp.
Fallen City of Karez has some of what you listed. You raid dungeons and use the rewards to construct new city buildings, some of which will help to better equip your raiding parties.
It got horrible reviews when it first came out, due in part to a badly-managed Kickstarter campaign, which is why you can find a copy on the BGG marketplace for $5. I bought a copy, downloaded the revised rules and played it solo a couple of time. I thought it was a decent and unique game.
Markus at jPlay did a good play through here, using his own solo variant: