A lot of cities are covered with trees. Memphis is.
This is East Memphis looking towards Midtown & Downtown, basically all of the most desnsely populated areas are in this pic, but it still has a lot of trees...
http://see-sip-taste-hear.blogspot.c...1_archive.html
So I'd say that it's not really unique for a city to be covered with trees. Many cities are like that.
St. Louis is far more dense that Memphis, but it also has a lot of trees. All of these pics are in the city limits:
http://www.romeofthewest.com/2007/11...ter-tower.html
http://www.romeofthewest.com/2007/11...ter-tower.html
http://www.flickr.com/photos/msabeln/3979577208/ (broken link)