What would be a really unique foot tattoo?

Im a 19 year old woman and I really want to get a tattoo on my foot. I want to get something semi-meaningful that represents something important in my life. I'm really into traveling and think i wanna get something to represent each country i've visited. so i want something i can keep adding to for each place i visit (kind of like the Dixie Chicks band idea that they get a chick footprint tattood on their foot for every platinum album) but can't decide on one. I thought about a footprint for each country, but i'm not sure... Id like to stay away from the standard flowers, erflies, stars, etc. because every girl gets those. Does anyone have any ideas????