The full name of the Unesco WHS site is Historic Centre Of Mexico And Xochimilco - and dear Ana insured that I receive postcards that represent both parts :) As the official Unesco web-site explains: Xochimilco lies 28 km south of Mexico City. With its network of canals and artificial islands, it testifies to the efforts of the Aztec people to build a habitat in the midst of an unfavourable environment. Its characteristic urban and rural structures, built since the 16th century and during the colonial period; have been preserved in an exceptional manner.
As I have been entertaining myself lately with the thoughts of going to Mexico and Central America, I thought to give myself a little reminder of how awesome the area is :) and maybe then I can finally learn spanish! Third time lucky they say...Gracias bossita!