In Mexico City, the past meets the present

An aerial view of the Fine Arts Palace in Mexico City. The theater is used for classical music, opera and dance presentations. Its building is well known for both its extravagant Beaux Arts exterior and its imported Italian Carrara white marble.  (Ronaldo Schemidt / AFP/Getty Images)

Thousands of pilgrims arrive at the Basilica de Guadalupe in Mexico City on Dec. 11, 2013, the eve of the feast day of Our Lady of Guadalupe.  (Omar Torres / AFP/Getty Images)

The Mexico City skyline is full of modern towers.   (Alain Jocard / AFP/Getty Images)

An ancient pyramid dominates the archaeological site of Teotihuacan, Mexico, near Mexico City.  (Ronaldo Schemidt / AFP/Getty Images)