Hubbard Street is a road in Chicago, Illinois named for early settler Gurdon Saltonstall Hubbard. Where Hubbard Street passes over the Kennedy Expressway, the latter enters a tunnel made up of surface streets known colloquially as "Hubbard's Cave". Hubbard Street has three distinct sections. The first, east of the Chicago River, runs from Kingsbury Street to Michigan Avenue. The second, longer section runs from Des Plaines Street west to Campbell Avenue (2500 W) The third and shortest section is a three-block stretch from Kilpatrick Avenue (4700 W) to Lavergne Avenue (5000 W) where it ends at the Hubbard Playlot Park. Notable buildings on this street include Courthouse Place at 54 W. Hubbard.