The enchanting and mysterious Trans-Siberian Railway is the longest of its kind.
Snaking through Russia at 60 km/h, it links Moscow with Vladivostok, a city a mere stone's throw from North Korea, and covers a distance of 9288 km.
However, an increasingly popular route is to ride the rails from Moscow down to Beijing via Mongolia, or vice-versa, covering a distance just shy of 6000 km and utilizing both the Trans-Siberian and the Trans-Mongolian railways.