Rail tunnel at the Israel/Lebanon border near Rosh HaNikra grottoes. This was the short living railway line Haifa - Beirut - Tripoli opened in 1942 (standard gauge). It was mostly used by military trains. Civilian trains between Istanbul and Kairo were planned, but never permitted by the British military. In 1946 the section across the border was already closed, but in 1964 when this photo was taken, the track was still intact.

Photo taken by Shlomo Berg, from Wikimedia Commons (public domain)