Hey clangedinn, how about some adventures in the concrete jungle called Havana? There are sewers underneath the city, and more and more buildings with many apartments/rooms/rooftops/etc. Good places to hide 'treasure', other instructions, etc. I think that might be cool. I'd be more then willing to facilitate and help out, if you're interested.
Also,
Max_argos' travellers guild / outpost project might somehow be part of these adventures. That those outposts might be a place where you can find instructions for new adventures, or something. Just an idea. And I think the
SRN Stations could also provide such a service.
More in general, Havana is open to any kind of projects/activities players might want to set up.