Castillo de Chapultepec
Fun fact: Mexico was, for a short time, under the rule of Maximilian I, a puppet emperor put in place by Napoleon III. The empire didn’t last long, but his 18th-century castle on a hill overlooking Chapultepec Park remains. Today it’s the National Museum of History, adorned in historical murals by José Clemente Orozco, Juan O’Gorman, and David Alfaro Siqueiros, and displaying costumes and historical ephemera from the 16th-century on. The most exciting rooms, though, are the ones that show exactly how the Emperor and his wife lived in the castle; meanwhile, the views of the park below are stunning.