Big project in progress

That's the big stuff i'm working on (you can see only 1/10 of the entire drawing), I give candies to the people who will find where she is (it's a kind of place not a specific city or else), try ! (it's quite hard ^^')

(I must apology to the one who asked me to make a tutorial, I tried but in fact I have no techniques, i don't make the line next the color etc, everything is so mixed that you would have get lost)