Houston in 1960 Houston in 2007 by

Houston in 1960 Houston in 2007 by
Downtown Tampa, Florida in 1956 Downtown Tampa, Florida in 2005 by
China, Lanzhou in 1980 China, Lanzhou in 2008 by
Baltimore in 1900 Baltimore in 2007 by
Atlanta in 1960 Atlanta in 2006 Atlanta in 2012 by
Athens, Greece in 1860 Athens, Greece in 2008 by
Downtown Manhattan 1928 Downtown Manhattan 1931 Downtown Manhattan 1950 Downtown Manhattan 1971 Downtown Manhattan 2007 Downtown Manhattan 2013 by
South Korea, Seoul 1898 South Korea, Seoul 1960 South Korea, Seoul 2000 South Korea, Seoul 2013 by
Japan, Yokohama in 1978 Japan, Yokohama in 2006 by
Seattle skyline in 197o Seattle skyline in 2007 by