File:Cmglee San Francisco Union Square SantaCon.jpg - Wikipedia
Retailers abandon ailing downtown San Francisco
Hotel Staypineapple Union Sq - 4 HRS star hotel in San Francisco (California)
San Francisco/Union Square-Financial District – Travel guide at Wikivoyage
Union Square, San Francisco - Wikipedia
Dewey Monument - Wikipedia
File:Citibank Union Square San Francisco 01.jpg - Wikimedia Commons
File:Union Square San Francisco.jpg - Wikimedia Commons
Market Street (San Francisco) - Wikipedia
JW Marriott San Francisco Union Square - Wikiwand
File:Maiden Lane, San Francisco from Union Square.jpg - Wikipedia
Union Square History - San Francisco - San Francisco To Do