Hyehwa Station opens onto Daehangno, Seoul's live-theater district — Marronnier Park, dozens of small playhouses, and the climb up to Naksan Park and the Ihwa Mural Village. Store your bag first and walk it all light.
Coin lockers at Hyehwa Station
Hyehwa Station (Line 4) has T-Locker coin lockers at 4 spots, about 128 in total — a large bank for a single-line stop. The biggest sits on B1 near the restrooms (about 43), with three more clustered toward Exit 4. See each spot and the live count by size on the Hyehwa Station page.
Prices are the same across Seoul — about ₩2,200 (small) to ₩4,400 (large) for four hours, then hourly. English screen, pay by card, no ID.