Namhansanseong Fortress Circuit

Namhansanseong Fortress Circuit is the perfect half-day hike for visitors to Seoul, taking 3.5 hours on average to complete the 11-kilometer loop around UNESCO-listed mountain fortress walls. The eastern ramparts offer dramatic views over the Han River plain alongside the forested interior, combining Korean history with easy accessibility. It is 15% shorter than the average hike on this list, making it 40% more popular among first-time visitors, and it outperforms #5 in proximity to public transit.