Gyeongui Line Forest Park

Where trains once ran toward the old Gyeongui Line, a long ribbon of lawn, trees and benches now threads through Yeonnam-dong — nicknamed 'Yeontral Park' for its Central Park vibe. Cafés, brunch spots and indie shops line both sides, and on warm evenings locals sprawl on the grass with takeout. It's Hongdae's mellow, green counterpoint.