[1] The train began operations on April 12, 2013, and is a shuttle train which loops around attractions in the central inland region of Korea, with stops, including Taebaeksan Mountain in Gangwon-do, Yeongju in Gyeongsangbuk-do, and Jecheon in Chungcheongbuk-do.

[1][2] It follows the same route as the older Circular Snow Flower Train (Hangul: 환상선 눈꽃순환열차).

[9] A sister Korail train, the V-Train, opened on the same day, and travels through the mountainous areas of the provinces of Gangwon-do and Gyeongsangbuk-do.

[8] The train's opening increased tourist interest in Gangwon's coal mining history.

[10] Buncheon station in Gyeongsangbuk-do, where a coal line once ran, showed increased visits in 2013, from both the O-Train and V-Trains, from approximately 10 passengers a day to 1000.