Hello Chewbacca and Hello MissAdventure.
This is how it works on a desktop computer.
I have not tried it on a mobile telephone, so this may depend whether someone using a mobile telephone cn do a mouse drag. So if it does not work please say.
First go to Google maps.
LINK > www.google.com/maps
Search for
Venice Italy
as there are other places called Venice.
You should get a map of Venice.
You may well get a map with Venice as tiny in the middle of the screen with the words
Saint Mark's Basilica
on the screen.
Over to lower right, there should be, arranged vertically, a + sign, a - sign, and a shape know as the "orange pegman" or sometimes just the "pegman".
To get into the street view pictures, one first needs to zoom in by clicking on the + sign. Do it slowly as many times as necesary until streets are diplayed.
Then one drags the orange pegman (that is mouse down, then drag, and when the dragging starts, there shouldlight up blue lines and possibly some blue circles superimposed on the map.
The blue lines are where somebody from Google has travelled with the special multilens camera, either in a car (generally, but not in Venice), or in a backpack, or on a barge, or on skis, whatever, with the camera system gathering an image from each lens every ten metres. Once one is "in" one can move along the street.
The blue circles are stand-alone 3d panoramas. Some sent in by members of the publc.
To get "in" one drags the orange pegman onto one of the blue lines or onto one of the blue circles and one then releases the mouse button. That mouse up event should result in being "in".
Please have a try to get "in" somewhere, anywhere, just to find out if that method works on the device that you are using.
If it does not work we can try to find out why and maybe get it to work.