Photo: GetYourGuideOne of the great museums of the world, the Museo Nacional de Antropologia in Chapultepec gathers the treasures of Mexicos ancient civilisations, from the colossal Olmec heads to the famous Aztec Sun Stone, beneath a soaring fountain-topped courtyard. It is enormous, so a ticket with a digital guide helps you focus. Do not try to see everything; pick the Mexica and Maya halls, and take a break in the shaded garden.