Hallo. How about a Rio de Janeiro map? I couldn't find any previous suggestion in that regard.
Apart from being one of the biggest and most well-known cities in the world, it is also a place with a very peculiar geography, that could result in an interesting map. The city has many steep hills and the largest urban forest area in the world, besides the long seashore, a lagoon... I'd be willing to work on that if somebody else is interested. I should say I am a Rio native myself...
Best
gustpacheco