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Golden Gate

Fireworks explode over the Golden Gate Bridge on May 27, 2012 in San Francisco, California. The Golden Gate Bridge celebrates its 75th anniversary today. The 1.7 mile steel suspension bridge, one of the modern Wonders of the World, opened to traffic on May 27, 1937. (Photo by Ezra Shaw/Getty Images)

Golden Gate Bridge's 75th anniversary

San Francisco has held a yearlong 75th anniversary celebration of the opening of the iconic Golden Gate Bridge with a string of parties, guided tours and festivals. The bridge opened to the public on May 27, 1937.