The Budapest Underground is the world's oldest electrified underground rail system and the second oldest multi-station underground rail system, after the London Underground, which was originally powered by steam. Budapest's first line, Line 1, was completed in 1896. Line M1 became an IEEE landmark due to the radical new innovations of its time: innovative elements of the railway included two-way trams, electric lighting in metro stations and trams; and an overhead cable structure instead of a third rail system for power. In 2002, the M1 line was listed as a UNESCO World Heritage Site.
The Elisabeth Bridge is the third newest bridge of Budapest. The bridge is situated at the narrowest part of the Danube, spanning only 290 m. It is named after Elisabeth of Bavaria, a popular queen and empress of Austria-Hungary, who was assassinated in 1898. Today, her large bronze statue sits by the bridge's Buda side connection in the middle of a small garden. The original eclectic flamboyant style bridge was built between 1897 and 1903. It was destroyed during World War II, and a significantly simplified brutalist version was built without any ornamentation between 1961 and 1964.
The tram network of Budapest is part of the mass transit system of Budapest, the capital city of Hungary. The tram lines serve as the second most important backbone of the transit system (after the bus network), carrying almost 100 million more passengers annually than the Budapest Metro. In operation since 1866, the Budapest tram network is one of world's largest tram networks, operating on 174 kilometres (108 mi) of total route. As of 2021, it was composed of 38 lines (26 main lines, and 11 supplemental lines denoted by an ’A’ , ’B’ or ’G’ after the route number), and the Budapest Cog-wheel Railway. The system is operated by Budapesti Közlekedési Zrt. (’Budapest Transit LLC.’) under the supervision of the municipal Budapesti Közlekedési Központ (’Budapest Transit Center’). Since 2016 Budapest tram system use the world's longest 9-sectioned articulated tram vehicle CAF Urbos 3/9.
Liberty Bridge is the third southernmost public road bridge in Budapest, located at the southern end of the City Centre. It was originally named Ferenc József híd (Franz Joseph Bridge). At its two ends are two public squares, Gellért tér (at the foot of Gellért Hill, with the Gellért Spa and Hotel Gellért) and Fővám tér (with the Great Market Hall). The Liberty Bridge is the shortest bridge in Budapest's center. Initially built as part of the Millennium World Exhibition at the end of the 19th century, the bridge features art nouveau design, mythological sculptures and the country's coat of arms adorned on its side. The northeastern house contains a museum on the bridges of Budapest. The bridge was the first in the city to be rebuilt after suffering heavy damage during World War II.