Credit: Andrew Choy
San Francisco International Airport (IATA: SFO) opened on May 7, 1927 on 150 acres (607,000 m²) of cow pasture leased from prominent local landowner Ogden L. Mills, and was named Mills Field Municipal Airport. During the economic boom of the 1990s and the dot-com boom, SFO became the 6th busiest international airport in the world. However, since the boom times ended, it has fallen back out of the top twenty.