As mentioned in this post about NYC, I have an attraction towards fire escapes. Fire escapes are all over NYC, and they come in many different shapes and designs. 99% of the time they seem completely unnecessary, but we all know they are vital to fire safety. Second bonus, if you get locked out, you may have a chance getting back inside via the fire escape. I know friends who have done it. Even though I don't have a balcony, I have a fire escape to chill on and that's enough for me.
Pictures were taken in SoHo and the Bronx.
On a related note, this plant-shelf from UO is awesome!!!