Sparkling inside its glass walls, this airy modern art museum is one of BA’s most impressive. It displays the fine collection of Latin American art of millionaire and philanthropist Eduardo Costantini, including works by Argentines Xul Solar and Antonio Berni, as well as pieces by Mexicans Diego Rivera and Frida Kahlo. The temporary exhibitions here are usually world class so it's worth checking what's currently on offer. A cinema screens art-house films.
Guided tours in Spanish of the temporary exhibitions are given on Thursday, Friday and Sunday at 5pm; tours of the permanent collection are on Wednesday and Sunday at 4pm.