Korea KTX Train Discounted KORAIL 2/3/4/5-Day Pass - KKday
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Riding the KTX Train from Seoul to Busan and Vice Versa (Where to go, what to expect, how to book a ticket through KTX website, plus book your seat in advance!) -
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Rail Report: First Class on the KTX from Busan to Seoul, South Korea (04 February 2019) | Within striking distance