Venice on the Yarra Gondola cruises are able to pick up or drop off passengers at the following pontoons on the city section of Melbourne's Yarra river.

Crown Casino
The Crown Casino floating landing is located on the south bank of the Yarra River, adjacent to the Crown Casino Complex (on the western side of the King's Way pedestrian bridge).  It is located just in front of the Warner Bros Store and the Automatic Bar and Cafe.  Melways Ref: 1A:C12

Melbourne Exhibition Centre
The floating pontoon is located on the south bank of the Yarra river, adjacent to the Melbourne Exhibition Centre.  It is approximately 5 metres from the Spencer Street Bridge (west side).  Melways Ref: 1A:12 A

Southbank
The floating pontoon is located on the south bank of the Yarra River, on the west side of the Pedestrian Bridge near Sheraton Towers.  (Melways Ref: 1B:L11).