You'll be picked up and dropped off inside the “Parking BSM Estació Barcelona Nord” (subterranean), whose entrance is located at 25 Carrer de Ribes. Please note the entrance isn't through the doorway of the building, but through the stairs that are located in front of the doorway, in a glass structure. Once at the door of the stairs, please ring the bell and the door will open automatically. Once inside the parking, on "Floor -1", you'll see a series of squares with Eco Tuk Tuk signs. Please arrive at least 5 minutes before the tour's starting time. In case of need, you can contact the local tour operator.