For a more thorough guide, please check out my post about the

Best Places to Propose in San Francisco

A related post about the best places to take pics in San Francisco can give you more options

For those who want to venture to more uncommon SF locations, check out these proposals:

Stow Lake proposal

Crissy Field proposal

Montara Beach proposal

Alamo Square Park proposal

Ritz Carlton Half Moon Bay proposal

Shakespeare Garden proposal

Pier 7 proposal

Lands End Labyrinth proposal

Kirby Cove proposal

Treasure Island proposal

Japanese Tea Garden proposal

Fort Point proposal