Budai Castle Tunnel

"The Budai Castle Tunnel (Budai Várhegy alagút) is a historic and functional tunnel located under the Buda Castle Hill in Budapest. It connects the Castle District with the Adam Clark Square at the foot of the Castle Hill, providing an important route for both pedestrians and vehicles. The tunnel is part of the city's extensive network of underground infrastructure, though its historical and architectural significance adds to its allure. Construction of the tunnel began in 1859 and was completed in 1867, originally designed to ease the traffic flow between the Buda Castle and the city below. The project was commissioned by Emperor Franz Joseph I of Austria, who wanted to improve transportation in the capital. The tunnel is approximately 350 meters long and was a major engineering feat for its time. It is built into the steep hillside, and its architecture combines both functional and aesthetic elements, with arches and vaulted ceilings. In the early years, the Budai Castle Tunnel was served by a funicular, but it has since become a part of the regular road network. Today, the tunnel remains a crucial connection, allowing for easier access to the Castle Hill area. It is also a popular spot for visitors, who can appreciate its historical value and the stunning views it offers as they approach the Castle District from the city center."