Andras Kozma, a renowned and often awarded scenery developer has created Venice and its two airports with the utmost of care (and patience, we never had a scenery project that took so many hours) using all the options that FSX has to offer. The new texture options and certainly the much better water effects make it possible to bring Venice to Flight Simulator as never before.
Although almost any building is done and the 3D effect of the city is unlike anything you've ever seen in FSX it is possible to maintain 20 fps without too much problem. And even at 20 fps the full 3D city remains loaded, reducing the nasty popup effect that is often used to get good frame rates. Even at ground level the level of detail remains so good that even using a simulated boat (you will find many on the internet) is a good option.