In the dark recesses of the Peruvian rain-forest, stands an unwavering Brazil nut tree - a titan among trees. For it to reproduce, this awe-inspiring pillar of strength relies on a series of intricate relationships with plants, animals and insects found in the wild. This means that the Brazil nut tree only grows in its natural habitat - the Amazon jungle. Without this incredible tree, many species will go extinct.

The air is thick and humid in the tropical forests of Mexico's Pacific coastal lowland. Woven into the landscape, a resilient Red Mangrove tree conquers the elements in a world repeatedly drowned by the tides. At 40 meters, this defiant survivor is among the tallest of its kind. Its tangled root system is a magical realm that provides shelter and food to an array of species, from fish, crabs and crocodiles, to some of Mexico's most exotic birds and mammals. In essence, the gnarled and robust Red Mangrove tree is a wild ecosystem inhabited by an assortment of creatures - a metropolis for wildlife.

The snow-capped peaks of Chile's coastal mountains are a prehistoric wonderland, blanketed in snow. Like ancient lovers, two living fossils - a male and female Monkey Puzzle tree - have been rooted to these slopes for almost two thousand years. For them to survive, the timeworn duo has formed a bond, both with each other, and the wildlife that visits them. But, the endangered Monkey Puzzle trees' future is uncertain, their numbers are diminishing. Can Chile's most revered trees persist against the odds when time has turned against them?