A biosphere reserve since 1981, Sian Ka'an contains tropical forests, mangroves, wetlands, dunes and marshes. It has rare hummocks found only in Cuba, the Everglades and the Yucatán.

The Tides of Time is an innovative multimedia campaign launched in 2008 by UNESCO, Jaeger-LeCoultre and the International Herald Tribune. The campaign, which included nanosites featuring theses videos in the online version of the International Herald Tribune, won a Silver Award at the 2009 International Awards for Innovative Digital Marketing Solutions.

This short video is part of Tides of Time, 2009, an interactive DVD that features eight of UNESCO World Heritage sites around the world. (consult it here)

on this subject: Tides of time and World Heritage Marine Programme