The Korail Pass allows unlimited travel on all trains managed by KORAIL including high-speed, conventional and tourist trains. Korail Pass is the best option to explore beyond Seoul and with passes ranging from 2 to 5 days, there is definitely an option to suit your travel plans. This provides foreigners visiting Korea with an unlimited access to the Standard Class seats of the KTX, KTX-Sancheon, Saemaeul, Mugunghwa, Nuriro and Tourist trains for a fixed period of time.