sentences:  Besides, it is entirely within fare zone 1 of the Autoritat del Transport Metropolità (ATM) fare-integrated public transport system for the Barcelona metropolitan area.The line was opened in 1906.Its upper station (Vallvidrera Superior) was designed by the architects Bonaventura Conill i Montobbio and Arnald Calvet i Peyronill in the Catalan Modernist style.