Some twenty years in the making, a new $2.26 billion transit center in San Francisco is expected to eventually host over 100,000 people per day. Salesforce Transit Center opened Aug. 11 with huge crowds for a public preview.

The massive facility boasts a five-acre rooftop park and is interspersed with art on four levels of a combined one million square feet.

From Hyperallergic: San Francisco Arts Commission convinced the intergovernmental agency developing the center to commit $4.75 million to on-site public art. Ranging from designed floors to interactive fountains, this funding supported work by James Carpenter, Julie Chang, Jenny Holzer, and Ned Kahn. These works are in addition to Jim Campbell’s “Day for Night,” a recently unveiled LED video piece covering the top 130 feet of neighboring Salesforce Tower, which is the second tallest building west of the Mississippi.