Expo 67 was open from April to October, 1967 in Montreal, Canada. The site consisted of two islands and a peninsula in the middle of the St. Lawrence River. The admission ticket was referred to as a passport and entitled the holders to free entry to all pavilions as well as unlimited use of the mass transit system - Expo-Express. The passport could be filled with "visa stamps" at the National Pavilions. Via: http://www.alamedainfo.com/Expo_67_Montreal.htm
Beautiful shot of #montreal's Buckminster Fuller Sphere, the US Pavilion from Expo 67. The World's Fair welcomed 50 million visitors and is regarded as one of the most important events in Montreal's history.