For me, one of the more enjoyable things to do in Venice is to go out at night taking pictures. The city is mysterious and quiet, and is perfectly safe. My favorite night shots are light trails. I put the camera on a tripod, put the camera in manual mode, set the iso at 200, and set the shutter speed to "bulb." I use a remote shutter release so I don't jiggle the camera. With the bulb setting, the shutter is open as long as I press the release.
I may have adjusted the exposure of one or two of these in post processing, and I obviously cropped one of them, but that's it. There is nothing "photoshopped" here.