You Lose Time After the Gates, Not on the Train! Riding the Seoul Subway—Memorize the Exit Number, Not the Map (₩1,550 Fares, Transfers, Last Trains, Express Traps)
Fares are low, trains come every few minutes, and every station carries a number—riding it may be among the easiest systems anywhere. Here’s the thing: Gangnam and Express Bus Terminal have well over ten exits, and the wrong one costs ten minutes in the open. The exit number in your Naver Map result, plus fares, free transfers, last trains and the Line 9 express trap.