Brand new opened on May, Shanghai EXPO museum is famous for its creative architecture design: bronze external walls symbolize mountain cliffs, and visitors walks up in the history river inside the walls and finally reach the celebration clouds built from steel and glass.
The first one is the model building of first EXPO in London: The crystal palace. Check out the caption picture if you are interested.
I found these colorful invention models really cute(and my son, he thought those are toys for sale and asked me to buy one)
London 1851: Electric telegraph, locomobile
Paris 1867: captive balloon, velocipede, hydraulic elevator
Vienna 1873: classroom
Philadelphia 1876: Corliss engine
Paris 1878 and Barcelona 1888: Phonograph, typewriter
Saint Louis 1904: wireless telegraph tower