Most fences could use a little fun incorporated into them. Here are a couple that I really like that use wrought iron nicely. Each is quite lovely and has a great deal of character.
The one above is in upper NW DC, a couple of blocks west of Connecticut Circle. I definitely wanted to look inside.
You have to look closely at this one below since I took it out of my car window in morning rush hour traffic. The actual place is an apartment house on Wisconsin Ave accross from the Cathedral in Washington, DC. I really like the modern combination of simple and square iron with the bricks. It makes a lovely window to the courtyard behind.