Located on the far west end of Venice, the cruise ship and ferry terminal is a short but ugly walk to the Piazzale Roma from the terminal. Another option is the inexpensive People Mover monorail, which links the port area to Piazzale Roma and Tronchetto.
Cruise passengers can check locations and departure on the Venezia Terminal Passegeri website. The terminal has a left luggage facility, but do check its opening hours. There's another one in Piazzale Roma.
Image by Dana Facaros and Michael Pauls