Old railroad tunnels on the Circum-Baikal Railway, the historical part of Trans-Siberian railway, on Lake Baikal, Russia. View from the tunnel Khabartuy II to the tunnel Khabartuyskaya Gallery at the 143rd kilometre of the Circum-Baikal Railway. Tunnel Khabartuy II is the second longest tunnel of the Circum-Baikal Road. The Circum-Baikal Railway was built in the beginning of the 20th century as the last segment of the Trans-Siberian Railway. Some people say that the Circum-Baikal Railway is the most beautiful railroad in the world.