GTX-A Seoul Guide: Korea’s Deep Underground Express from Daegok to Seoul Station
Let me be honest with you: I did not plan to ride the GTX-A to Seoul Station that morning. I was fully prepared for the relaxed Line 3-to-Line 4 route — sixty minutes of familiar subway, coffee in hand, no rush. Then my family happened. And suddenly the GTX-A wasn’t a choice. It was the …