Question: how to book itx to nami island?
Answer: Step 1: Buy the ITX Tickets Online. ...  Step 2: Take the Metro to Yongsan Station. ...  Step 3: From Yongsan Station, Take the ITX Train to Gapyeong Station (60 minutes) ...  Step 4: From Gapyeong Station, go to Nami Island Stop (5 min).