Journey with National Geographic to the tiny island of Siarau on the northern coast of Borneo, where a tidal mangrove forest survives. Caught between land and sea, the forest and its creatures have adapted in bizarre ways to the daily flooding of their habitat. Tree roots grow above ground in search of oxygen; mudskipper fish have developed specialized gill chambers that allow them to live out of the water; and the highly adaptive proboscis monkey is a skillful swimmer and climber. Experience a saltwater wilderness still untouched by man in one of the world's last great places.