The Palau Sant Jordi is on a mountain.It's situated in the Montjuic district, the nearest underground stop is "Espanya" in Line 1 and 3, once you go out of the underground, you should look for the Montjuic Magic Fountain (Fuente Magica de Montjuic in spanish), and then you have to go up and up (there are electric stairs that will help you!) and then you arrive to the venue.It's next to the Olympic Stadium, the Palau is the indoor venue.