Hallidie Plaza is a public square located at the entrance to Powell Street Station (the third busiest BART station as of 2015) on Market Street in the Union Square area of downtown San Francisco, California. The plaza also contains a Visitor Information Center, serving more than 400,000 visitors per year, where the staff can provide information in 14 languages.
The plaza sits 20 feet below street level, built with granite walls, terraced concrete planters and brick paving, extending into a walkway underneath Cyril Magnin Street. It is located next to the Flood Building and the cable car turntable at Powell and Market streets, and opposite the Westfield mall.
Hallidie Plaza opened in 1973, as central element of a remodeling of Market Street spurred by BART. It was named after Andrew Smith Hallidie, who developed the world's first cable car system in 1873.
The San Francisco Chronicle's urban design critic John King has described Hallidie Plaza as desolated, denounced its design as deeply flawed and commenting that "what was envisioned as a grand entrance instead is a void to avoid, a deep, angled space beloved by none but too pricey to fix."