What will the world be like when mankind is extinct? The pyramids may stand forever, but the cities will disappear. Our greatest masterpieces will fade and crumble. As global warming and the depletion of natural resources become ever more pressing issues it is critical to consider how we can reduce our impact on the planet. Journey to locations around the globe already going through the processes of a lack of human intervention. See the changes wrought in just decades in ghostly settlements like Chernobyl, which was abandoned since only 1986, and island towns off the coast of Maine. How long would it take before the last remnants of mankind completely disappeared?