Hallidie Plaza

Hallidie Plaza is a sunken public space that sits twenty feet below street level at the busy intersection of Market and Powell Streets. You can identify the site by its distinctive granite walls and terraced concrete planters, which form a triangular depression crossing under Cyril Magnin Street. Opened in nineteen seventy-three, the plaza was designed by architects Lawrence Halprin, John Carl Warnecke, and Mario Ciampi as a grand pedestrian entrance to the newly built Powell Street subway station.