(1904). Bohemia: Prague (1891); Teplice (1895); Liberec (1897); Ústí nad Labem, Plzeň, Olomouc (1899); Moravia, Brno, Jablonec nad Nisou (1900); Ostrava (1901); Mariánské Lázně (1902); Budějovice, České Budějovice, Jihlava (1909) Austrian Silesia: Opava (Troppau) (1905), Cieszyn (Cieszyn) (1911) Dalmatia: Dubrovnik (1910) Galicia: Lviv (1894), Bielsko-Biała (1895); Kraków (1901); Tarnów, Cieszyn (1911) Electric tramway lines in the Kingdom of Hungary: Hungary: Budapest (1887); Pressburg/Pozsony/Bratislava (1895); Szabadka/Subotica (1897), Szombathely (1897), Miskolc (1897); Temesvár/Timișoara (1899); Sopron (1900); Szatmárnémeti/Satu Mare (1900); Nyíregyháza (1905); Nagyszeben/Sibiu (1905); Nagyvárad/Oradea (1906); Szeged (1908); Debrecen (1911); Újvidék/Novi Sad (1911); Kassa/Košice (1913); Pécs (1913) Croatia: Fiume (1899); Pula (1904); Opatija – Lovran (1908); Zagreb (1910); Dubrovnik (1910). Underground The Budapest Metro Line 1 (originally the "Franz Joseph Underground Electric Railway Company") is the second oldest underground railway in the world (the first being the London Underground's Metropolitan Line and the third being Glasgow), and the first on the European mainland. It was built from 1894 to 1896 and opened on 2 May 1896. In 2002, it was listed as a UNESCO World Heritage Site. The M1 line became an IEEE Milestone due to the radically new innovations in its era: "Among the railway's innovative elements were bidirectional tram cars; electric lighting in the subway stations and tram cars; and an overhead wire structure instead of a third-rail system for power." Inland waterways and river regulation In 1900 the engineer C. Wagenführer drew up plans to link the Danube and the Adriatic Sea by a canal from Vienna to Trieste. It was born from the desire of Austria–Hungary to have a direct link to the Adriatic Sea but was never constructed. Lower Danube and the Iron Gates In 1831 a plan had already been drafted to make the passage navigable, at the initiative of the Hungarian politician István Széchenyi. Finally Gábor Baross, Hungary's "Iron Minister", succeeded in financing this project. The riverbed rocks and the associated rapids made the gorge valley an infamous passage for shipping. In German, the passage is still known as the Kataraktenstrecke, even though the cataracts are gone. Near the actual "Iron Gates" strait the Prigrada rock was the most important obstacle until 1896: the river widened considerably here and the water level was consequently low. Upstream, the Greben rock near the "Kazan" gorge was notorious. Tisza River The length of the Tisza in Hungary used to be . It flowed through the Great Hungarian Plain, which