Mexico City spans centuries in a single sprawling metropolis, so a short trip demands a tight itinerary. The Zócalo and its surrounding Centro Histórico anchor the colonial core, where the Mexico City Metropolitan Cathedral and the excavated ruins of Templo Mayor sit steps from one another, revealing Aztec and Spanish layers side by side. A short ride away, Museo Nacional de Antropología distills the country's pre-Hispanic heritage into one unmissable stop, while Frida Kahlo Museum in Coyoacán offers an intimate counterpoint. For a change of pace, boat rides through the flower-lined canals of Xochimilco or a morning at the Teotihuacán Pyramids round out the essentials without overloading a limited schedule.