Explore Lake Naivasha & Hell's Gate National Park! The highest of the Rift Valley lakes, Lake Naivasha is home to a wide variety of birds and numerous hippos. This freshwater lake lies close to Elsamere, the former home of Joy and George Adamson of Born Free fame. Activities include boat rides to Crescent Island Game Sanctuary and bike rides in Hell’s Gate National Park, as well as relaxing on the cool lake shores and visiting Elsamere. You will love it!