When Sir George Whitehouse spotted Nairobi for a store depot, shunting and camping ground for the Indian labourers working on the Lunatic Express railway, Nairobi was uninhabited swampland. More than a century later, it is the largest city in Kenya, a metropolis of colourful people, diverse cultures and thriving economy. It is arguably the only city on earth with a National Park. Here, tradition coexists alongside the finest a modern world can provide. Welcome to the city under the sun.