The city looks nice and is admirably detailed. As for constructive criticism, the linework of the mountain base looks a bit off to me. While highly detailed, the "terraced" ridges seem a bit unnatural. Also some of the peaks appear almost completely flat. Now if this is supposed to be representing a mesa as opposed to a mountain base then this would make sense (as would the terraced ridges), but for a mountain base at the scale and top-down perspective you are representing it the base ought to have gentler slopes with ridge lines that descend downward from the peak at varying angles. If you haven't done so I'd recommend using photo reference for this. Anyway that's my two cents. Nice work overall though.

Cheers,
-Arsheesh