Finding building models and other assets that work in more exotic latin environments is almost impossible.
I propose a kit for creating street scenes in Havana/Cuba; worn buildings, old America cars from the 50s (although these are relatively easy to find elsewhere), shops, bars, dance halls, cafes, musicians, artists, propaganda posters, exotic plants and trees (again; relatively easy to find).
Belle epoque, neoclassicistic architecture.
A clean (non-worn) version of the exact same assets could be used for building scenes from France, Italy, Spain and most of South America.
All of the above could work well with themes like drug cartels, exotic getaways, James Bond-type locations etc