1. Mara and Dave "We have to hurry up!" Mara exclaims as she starts to run down the platform under the web of steel and glass of the Santa Apolónia railway station. "We're going to make it, there is our wagon," gasps David, keeping up behind Mara with a large trekking backpack that is shaking with every step. Mara and David were already traveling for one month, enjoying their semester break by exploring Europe by train. T...