If you get in by train,take the railway of RENFE or the Metro.The Railway of RENFE there are all ways to get in.The C-1,C-2,C-3,C-4,C-7,and C-10 to Sants is reality or take the C-5 and C-6 to Plaza de Espana.The Metro for TMB can also get you to Sants. On the L3 and L5 you can get to Sants real easily.Also the Suburban FGC trains can get you to Plaza de Espana. There is also an FGC Metro. It gets you to Plaza de Espana and Plaza de Catalunya. The L6,L7,S1,S2,S5,and S55 trains get you to Plaza de Catalunya. The L8,S33,S4,and S8 to Plaza de Espana.The TRAM trains go in the T1,T2,and T3 in the Llobregat area and the T4,T5,and T6 in the Besos area.
Xanascat is the National Network of Youth Hostels for all of Catalonia