Minneapolis skyline and Stone Arch Bridge over the Mississippi River, Minnesota, U.S.A. (© Joe Mamer/age fotostock)

Skyline with Indiana State Museum, Indianapolis, Indiana (© Henryk Sadura/Corbis)

Vancouver skyline, British Columbia, Canada (© Stephen Matera)

Toronto skyline during the Canadian National Exhibition, Ontario, Canada -- Gary Cralle/Getty Images ©

Skyline of Pittsburgh, Pennsylvania -- Kordcom Kordcom/Age Fotostock/Photolibrary ©

Illuminated Boston Skyline at night, skyscraper, Massachusetts -- Olaf Broders/Photolibrary ©

Highways and skyline of Shanghai, China -- Jose Fuste Raga/Corbis ©