Venice is known for it's pigeons and you have to watch out. Here's a little example of why.
I was walking around in the maze that is Venice. I had just passed in front of a cybercafé when I thought, "Hey, it's 9am back home, that's the time my friend starts to work. I should write him an e-mail to brag about the really nice vacation I'm having. Yeah that's what I'll do!!!" This is just the time when a pigeon decided that my head would make an excellent place for him to drop it's excrement. So he did, right in the middle of it.
Venice is a place built on the water, well that particular morning I think I searched for a fountain over 45 minutes and when I finally found one it was 200 metres from where I started my search. After that I wrote an e-mail to my friend, telling him what had just happened, he really laughed a lot. Since then I try to be a little bit more humble when I talk about my vacations in Europe and never brag about them cause you never know what can happen.