Ключевые слова: architecture, buildings, chi, chicago, city, colorful, commute, design, developement, directions, engineering, exterior, gap, illinois, line, loop, metro, metropolitan, mind the gap, moving, old, on time, passengers, platform, public, railway, schedule, security, subway, surrounded, the loop, ticket, time, tourism, traffic, train, transit, transport, transportation, travel, underground, urban, usa, vacation, vintage, work,