1651 Papyrus growing on the banks of Lake Naivasha

1652 Hippos in Lake Naivasha

1653 Hippopotamus

1654 Slender mongoose

1655 Long-tailed cormorants drying their wings on a dead tree in Naivasha

1656 Black and white colobus monkeys below the fever trees at the lake side

1657 We spotted a giraffe as we drifted past in our boat

1658 The entrance to Hell's Gate National Park

1659 Fischer's tower (right) is a volcanic plug originally injected into the surrounding rock, which has since weathered away

1660 Steep valley walls at Hell's Gate. A variety of large mammals live in the Park

1661 The flat bottom of the valley was once a large lake

1662 Impressive cliffs

1663 Cliffs at Hell's Gate

1664 The valley winds back several kilometres

1665 Ruppell's griffon vulture nesting on the cliff

1666 Grant's gazelles were very common here

1667 A male Kori bustard

1668 This warthog had the biggest tusks we've ever seen

1669 A Grant's zebra

1670 Eland with impalas behind

1671 Eland taking it easy

1672 Black and white colobus monkey in a fever tree at Naivasha

1673 Fischer's tower

1674 Lake Naivasha