Seoul Subway Guide: Navigate Korea's Capital Like a Pro 🚇🇰🇷 The Seoul subway system is not just a mode of transportation; it’s a lifeline for both locals and tourists alike. With 23 lines and over 700 stations, it’s one of the largest and most efficient subway systems in the world. 🌏 But don’t worry—it’s also super user-friendly! Here's your ultimate guide to conquering Seoul’s subway system..