The request is part of a campaign which sees some of world's landmarks, including the Sydney Opera House and the pyramids, turn green on 17 March.

BBC: Queen answers Irish bid to turn Buckingham Palace green

My love of travel began with childhood visits to Mexican ruins and beaches, and I feel the U.S. is fortunate, not cursed, to be so close to a place that offers jungles, deserts, volcanoes, beaches, coral reefs, ancient pyramids, living pre-European cultures and some of the world's most satisfying cuisines.

CNN: Travel expert: Why you should go to Mexico