 With me is Rajan Dutta, one of the BBC's biggest travellers. And it's fair to say that there are some places that are doing well. They have come up with some solutions and they're working. There are two sides to this. One is what the local municipality does, or the local mayor or whoever. The other one is what we can do as individuals. So let's just start with what places can do. So in Venice, for example, they have introduced this five euro admission fee.