Photo taken on July 9, 2016 shows a view of the Mount Longonot National Park in the Great Rift Valley near Nairobi, capital of Kenya. Mount Longonot is the highest volcanic mountain in the Great Rift Valley, about 2,800 meters above sea level. The dormant stratovolcano is one of the youngest volcanoes in the world, formed from one of the colossal eruptions which became known as the Great Rift Valley. (Xinhua/Zhu Shaobin)

Photo taken on July 9, 2016 shows a view of the Mount Longonot National Park in the Great Rift Valley near Nairobi, capital of Kenya. Mount Longonot is the highest volcanic mountain in the Great Rift Valley, about 2,800 meters above sea level. The dormant stratovolcano is one of the youngest volcanoes in the world, formed from one of the colossal eruptions which became known as the Great Rift Valley. (Xinhua/Pan Siwei)

Photo taken on July 9, 2016 shows a view of the Mount Longonot National Park in the Great Rift Valley near Nairobi, capital of Kenya. Mount Longonot is the highest volcanic mountain in the Great Rift Valley, about 2,800 meters above sea level. The dormant stratovolcano is one of the youngest volcanoes in the world, formed from one of the colossal eruptions which became known as the Great Rift Valley. (Xinhua/Zhu Shaobin)

A girl climbs the Mount Longonot in the Great Rift Valley near Nairobi, capital of Kenya, on July 9, 2016. Mount Longonot is the highest volcanic mountain in the Great Rift Valley, about 2,800 meters above sea level. The dormant stratovolcano is one of the youngest volcanoes in the world, formed from one of the colossal eruptions which became known as the Great Rift Valley. (Xinhua/Pan Siwei)

Photo taken on July 9, 2016 shows a view of the Mount Longonot National Park and part of the Great Rift Valley near Nairobi, capital of Kenya. Mount Longonot is the highest volcanic mountain in the Great Rift Valley, about 2,800 meters above sea level. The dormant stratovolcano is one of the youngest volcanoes in the world, formed from one of the colossal eruptions which became known as the Great Rift Valley. (Xinhua/Pan Siwei)