Münden Tunnel a tunnel as well. The tunnel breakthrough was on October 6, 1988. On May 29, 1991 the tunnel was officially opened, along with the Hanover-Fulda part of the high-speed rail line. The cost of construction was about DM 200 million (€102 million). Münden Tunnel The Münden Tunnel () is a railway tunnel on the Hanover-Würzburg high-speed rail line in Germany. It is situated south of the town of Hann. Münden between Göttingen and Kassel. At a total length of 10,525 metres, it is the second longest tunnel in Germany after the Landrücken Tunnel. The tunnel was built between 1983 and
Channel Tunnel the top tunnel used for transport and the bottom one for groundwater flows. In 1839, Aimé Thomé de Gamond, a Frenchman, performed the first geological and hydrographical surveys on the Channel, between Calais and Dover. Thomé de Gamond explored several schemes and, in 1856, he presented a proposal to Napoleon III for a mined railway tunnel from Cap Gris-Nez to Eastwater Point with a port/airshaft on the Varne sandbank at a cost of 170 million francs, or less than £7 million. In 1865, a deputation led by George Ward Hunt proposed the idea of a tunnel to the Chancellor of