There’s the MALBA and the MAMBA, and now the newest gallery in town is the MACBA, opened in September 2012 in San Telmo. Its focus is on geometric abstraction and op-art, making it hip and innovative. Past exhibits have focused on Italian Kinetic art from the '60s, on the works of Japanese-Argentine artist Kazuya Sakai's jazz-influenced geometric paintings, and an expansive exhibit of 20th century geometric abstraction from around the world. There are family-friendly tours on weekends at 3:30pm. It's right next to the Museo de Arte Moderno (MAMBA), in an austere four-story glass box.