It's impossible to imagine San Francisco without certain landmarks.

What would the city be without curvy Lombard Street, luxurious Union Square or, gasp, the Golden Gate Bridge? But once upon a time, these now-iconic landmarks were in their infant stages. Take a crazy look back at some postcard views before they were famous.

Coit Tower was built using one-third of patroness Lillie Coit's estate, which was donated to the city for the purpose of beautification. This photo was taken in 1933, the same year construction was completed on the tower. (via San Francisco History Center, San Francisco Public Library)