Beneath the impressive 17,000-foot-high Popocatepetl volcano lies bustling Mexico City, home to fantastic museums, archeological treasures and dynamite cuisine. Begin your exploration at the Zocalo, the world's second largest public square and the former site of Montezuma's palaces and pyramids. Then, visit the excavation of Templo Mayor (Main Temple) of Aztec Tenochtitlan to catch a glimpse of Aztec history. And don't miss Palacio de Bellas Artes, where you'll see murals by famous artists like Diego Rivera and Chapultepec Park, as well as lakes, a zoo and several excellent museums. There's so much to see and do, and with a mild climate and year-round temperatures averaging 70 degrees Fahrenheit, you can do it all any time of year.