Polyforum

This auditorium, housed in an eye-catching 12-sided building, houses the world's largest mural, ''La Marcha de la Humanidad'' (''The March of Humanity''), painted by the Mexican muralist David Alfaro Siqueiros in the 1960s. The outside of the building is also covered with enormous murals, as is a wall partly encircling the building. During the week the murals inside are dimly lit, but on weekends visitors can attend a sound and light show, with an recording by Siqueiros describing his vision