Hello Mimi642. We bought our Tourist Ticket at the Santa Lucia railway station. I'm not sure if you are going on the Best of Italy, but I'll just give a little info about how we got to the station. On that tour day, we had travelled from Assisi to Venice and arrived at our hotel (Plaza) in Mestre at approximately 3:30 p.m. The optional gondola ride was to occur that night. Not everyone was taking the optional gondola ride, yet many people were going into Venice. Our tour director said that anyone wishing to go to Venice could get a ride with our bus. The bus left our hotel at approximately 5:30 p.m. and went across the bridge that joins Mestre (the mainland) to what we all think of as Venice. It dropped us off near the Santa Lucia Ferrovia railway station.
Just outside the station, close to the Ponte degli Scalzi bridge, there is a booth where you can buy tickets for the waterbuses. I have the tickets in front of me as I am typing this. They are called 'Tourist Ticket' and cost 12 euros each. A single ride on the Grand Canal costs 5.50 euros (The
www.actv.it site says 5 euros, but I believe it was 5.50). . To put that in perspective, a ride up to Piazza S. Marco and then back to the railway station would cost 11 eruos. The tickets are blue and the size of a business card. They are valid for 24 hours from the time of validation. We validated them just after 6:00 p.m. and used them all that evening and the next day after our included guided tour of Venice was over. You validate them at these little yellow boxes close to the entrance to the waterbus stops.
I had photocopied a map of the waterbus routes from the DK Eyewitness Guide to Italy. The book also explained a little about the routes and where they went. We mostly took routes 1 and 82. One of those is the slow bus up and down the Grand Canal that stops at every stop. We even went out to the Lido (the beach). . We hopped on and off whenever we pleased. The Tourist Ticket may not be valid for routes out to Murano and Burano, but we had already visited Murano with our group that morning. At the waterbus stops, you can go in two directions. There are signs with all the names of the stops on that route and an arrow that points in the direction that bus is going. I know the travel books tell you to be careful of pickpockets on the waterbuses. Our reality was that the majority of people on these buses were tourists and we always felt extremely safe.
To get back to Mestre, we took the waterbus to Santa Lucia railway station and then took the train back to Mestre. All trains stop at Mestre, so we just took the first one that was leaving the station. It turned out that half our tour group was on the same train! The train tickets were 1 euro each and could be purchased at self serve machines located inside the station. The machines gave you a choice of languages. As with the waterbus tickets, you have to validate them before getting on the train. A train employee did come around to check tickets. We had such a great time and took some amazing pictures of Venice from the water. Hope this helps. Enjoy your trip!