The environmental Evrard Wendenbaum leads teams of scientists to inaccessible remote areas, to the last so-called “undiscovered” places. To explore those hostile and dangerous areas they need to cross cave-systems underneath icebergs in Greenland, ride down steep water rapids in Indonesia, and climb through a huge rock maze in Madagaskar. For the first time these natural treasures are documented, in order to better protect them from destruction.