Chicago Architecture River Cruise. Experience one of the world’s most beautiful cities on a 75-minute cruise on the historic Chicago River. On this architecture cruise, head down the main branch of the Chicago River, up the north branch to the East Bank Club, and then south past Willis Tower (Sears Tower) to the old Post Office Building. Take in magnificent city skyline views as you see more than 40 notable buildings, including the John Hancock Center and the Wrigley Building, and learn about their distinctive architecture from your onboard guide, an expert in architecture. Book with us and Save 10%: Chicago Architecture River Cruise.