Circum-Baikal Railway (KBZD) is the name that was used during construction and in the first years of operation with respect to a piece of the Zabaikalskiy railway from the station Baikal to station Mysovaya, with the length of 260 kilometers (now this site is a part of the East Siberian Railway). Currently under the Circum-Baikal Railway is usually meant being 1956 deadlock piece of the station Slyudyanka II (an offshoot of modern travel Trans-Siberian railway) and station Baikal. Until 1949 across the Circum-Baikal Railway passed the main way of the Trans-Siberian Railway, part of which (from the station Irkutsk-sorting station to Slyudyanka II) was transferred to the newly-built backup railway section from Irkutsk, extending to the southern tip of Lake Baikal through the Bolshoy Loog. Section from station to station Slyudyanka II - Mysovaya is a part of the Trans-Siberian Railway to the present. The piece extending along the southern tip of Lake Baikal on the southern part of the plateau Olkhinskoye from the city Slyudyanka to Port Baikal is a unique monument of engineering art.