Twenty miles off the coast of Eastern Africa, four modern-day explorers are sailing toward the unknown, the deep interior of Tanzania. They'll travel 970 miles through African terrain that is as stunning as it is fraught with danger. Using only a compass and basic maps, they will attempt to recapture the spirit of one of the world's most remarkable adventures - journalist Henry Morton Stanley's perilous 1871 journey to find Dr. David Livingstone. Their historic exploration has been captured by one of the premiere storytellers of our time , Mark Burnett, for the eight-part History series EXPEDITION AFRICA: STANLEY & LIVINGSTONE. This is not a competition or a game, it's a real-life adventure.

The Expedition Africa iPhone Application can aid you in your own adventures by turning your iPhone into an instrument to calculate the distance to a far-off landmark. It takes measurements from two nearby landmarks and uses triangulation to calculate the distance.

The app uses the iPhone’s GPS to help you measure the distance between your two nearby landmarks. Then it uses the iPhone’s camera to calculate the angles. Based on that info, it calculates the distance to your target!

This app requires serious user precision, but we think you can handle it!