The expanded building includes features such as a large-scale vertical garden on the third floor, purported to be the biggest public living wall of native plants in San Francisco; a free ground-floor gallery facing Howard Street with 25-foot (7.6 m) tall glass walls that place art on view to passersby; a double-height "white box" space on the fourth floor with sophisticated lighting and sound systems; and state-of-the-art conservation studios on the seventh and eighth floors.