Barraport
Barraport rests in a valley and is surrounded by mountains. It still provides plenty of flat land to build your city on. Due to the landscape outside connections are limited, there is one highway, one rail track and no airplane ways. But the multiple ship routes provide an efficient infrastructure to build your city around!
I recomment playing with the 25 Tiles mod since buildable ground (48%) is somewhat scattered around.
In the screenshots I used the color correction “CLARITY” by SwiftyJake and the mod “Road color changer” by hyperdrive_engage, both are of course optional.
Enjoy!