Polyforum Siqueiros is at Av. Insurgentes Sur #701 (at the corner of Av. Filadelfia), on the grounds of the World Trade Center Mexico building complex. Housed in a twelve-sided exposition hall, it is the work of muralist David Alfaro Siqueiros (1896-1974). The vivid Siqueiros murals covering the building's exterior walls are not only a monument to the artist but make for a good photo opportunity. Inside, on the upper level, a revolving floor gives visitors an unimpeded look at the 26,150-square-foot ceiling mural “March of Humanity.” A sound-and-light show is projected on the mural Saturdays and Sundays at noon and 2 p.m.
Note: The building is in the southern part of the city, a considerable distance away from the main tourist areas in the vicinity of Chapultepec Park; if you're a Siqueiros fan and want to see the art, take a taxi associated with your hotel and have the driver wait while you view the mural. The site is closed for renovations until mid 2020.