The Ex Hacienda San Gabriel de Barrera is an 18th-century former silver-processing estate located in Guanajuato City, Mexico. Today, it serves as a prominent Casa Museo (House Museum) and cultural site famous for its diverse botanical gardens and colonial architecture. The site’s main attraction is its collection of 17 distinct gardens, each designed in a different style, including English, Oriental, Mexican, and Italian. One specific area, the Jardín de la Reina, was notably used to host a banquet for Queen Elizabeth II.