CBS News Travel Editor Peter Greenberg reveals the hidden gems of Quintana Roo, ranging from Mayan ruins, to a special biosphere reserve. Plus, a warning about some of the most polluted rivers in the world that you will want to avoid.
CBS News Travel Editor Peter Greenberg reveals the hidden gems of Quintana Roo, ranging from Mayan ruins, to a special biosphere reserve. Plus, a warning about some of the most polluted rivers in the world that you will want to avoid.