This stamp shows a bridge over the Mississippi River. It is part of the Trans-Mississippi set.
This 25c airmail stamp shows a Boeing B377 Stratocruiser flying over the San Francisco-Oakland Bay Bridge.
This stamp commemorates the Brooklyn Bridge.
This stamp commemorates the opening of the Verrazano-Narrows Bridge between Staten Island and Brooklyn, New York.
This stamp commemorates the dedication of the Mackinac (pronounced mak-i-naw) Bridge that connects the upper and lower peninsulas of Michigan.