Yann Arthus-Bertrandさん The heart is in New Caledonia, which a group of Pacific islands covering 7,000 square miles (18,575 km2). It has 80 square miles (200 km2) of fairly low (25 to 33 feet, or 8 to 10 m) but very dense mangrove swamp, primarily on the west coast of the largest island, Grande Terre.
