Not only is the Express Bus Terminal a major transportation hub, it’s also the site of Seoul’s largest underground shopping mall. Attached to the subway station, Goto Mall sprawls for a half-mile and houses more than 600 stores. When visiting, wear comfortable shoes and prepare for a shopping spree. The west end of the mall is a haven for savvy fashionistas seeking inexpensive but trendy Korean clothing and shoes, while the east end features home goods, furniture, and plant stores. After working up an appetite, head to the corridor in the basement of the luxury department store Shinsegae, where there are several gourmet food stalls.