Tickets can be purchased at the tourist office but can also be purchased online at the official website. It comes out for 16 euros and comes with audio guides in different languages with Spanish included.
For all visitors to Dublin it is a good option to avoid walking a lot. You can climb at Trinity College. Get off at Guinness Storehouse that is a little far away or also in the great prison of Kilmainham or even in the Phoenix park -the largest park in Europe within a city- and take a walk through the meadows, the zoo or go in search of the deer that inhabit it.
After visiting the Phoenix Park, the bus returns to the center through the street attached to the Liffey River on the left until you reach O'Connell where the street goes up to Parnell Square and ends at a point near the writers museum, another Interesting place on your visit to Dublin.
We did the traditional tour that runs through the city center. However, there are other tourist buses worth mentioning as the Ghostbus tour which introduces us to the world of ghosts in Dublin, the North coast bus which takes us to the beautiful Howth Peninsula and the Malahide Castle and the South coast bus which takes us to the cliffs of Bray and the great gardens of Powerscourt Gardens.