Mexico City mixes traditional with modern, Aztec with Spanish. Listen to the tinny music of 1800s street organs and chirping of traffic police whistles. When your legs need a rest take a seat in Alameda Park just down from the Palacio de Bellas Artes, a cultural centre and worth looking at just for the architecture. So much to see and learn in the historical centre and further out. You could spend a week here! Add in a visit to Xochimilco Market and Canals while you're not too far away at the Frida Kahlo museum or take a day trip out to the Teotihuacan Pyramids and Guadalupe Basilica.