The dream of sending humans to Mars is closer than ever before. In fact, many scientists believe that the first person to set foot on this red planet is still alive today. But where should the first explorers go when they arrive there? Horizon has gathered the world's top Mars experts and asked them: Where would they go if given the opportunity? What do they need to survive? Horizon utilizes incredible real-life images and data to turn these Martian landmarks into reality, from vast plains to towering volcanoes, from deep valleys to hidden underground caves. The program will also show viewers where to land, where to live, and even where to search for traces of extraterrestrial life. This is the ultimate traveler's guide to Mars.