Philadelphia seems to have a lot of tall and narrow apartment buildings. This seems to be a function of the small blocks and narrow lots of the old center city (and of course, land prices/values as well). I really don't know much about these, but they are fun. 
They are mostly found on corner sites. I don't know if you can see the gargoyle's on the bay window. I notice them more in other shots, since they blend in so well in this shot.
An art deco tower.
Somewhat spooky looking against a Helmut Jahn backdrop.
This last one isn't quite so tall, but it's proportion plan-wise isn't far off.
