世界最短的地铁

杜乃尔是土耳其伊斯坦布尔的地铁线，意义为隧道，建于1875年，为世界上仅次于伦敦的古老地铁。这条地铁线仅有首尾两个车站，约长573米，经世界纪录认证机构（WRCA）官方审核，被确认为是世界上最短的地铁线。它连接着伊斯坦布尔最繁华的两个地区。最初是马车行走的隧道，1910年改为铺设轨道由电车行驶。目前该线仍保持正常运营，行车间隔为3.5分钟，每次单向旅程耗时1.5分钟。

The Tünel is a historical underground funicular line in Istanbul, Turkey, located at the northern shore of the Golden Horn. It has two stations, connecting the quarters of Karak?y and Beyo?lu. Its tunnel goes uphill from close to sea level and is about 573 metres (1,880 feet) long. After on-site verification by the World Record Certification Agency (WRCA) officials, it is considered the shortest subway line in the world. Inaugurated on January 17, 1875, the Tünel is the second-oldest extant subterranean urban rail line in the world, after the London Underground (1863). At present, the line is still operating normally, with an interval of 3.5 minutes, and each one-way journey takes 1.5 minutes.