Av. Potosí 1450. Includes the Palacio Portales mansion, gardens (Jardines), and an art museum (Centro de Arte Contemporáneo). The mansion was built by Patiño, a tin magnate who controlled over half of the nation's output in the 1930s. Guided tour Tu-F, 15:30, 16:30, 17:30 (Spanish), 16:00, 17:00 (English).