East Africa's largest country remains one of the continent's most definitive and stirringly original safari destinations. Blessed with a string of superlatives unmatched on the continent: Africa's highest mountain, its largest game reserve, its biggest volcanic caldera, its oldest human settlement; and - towering above all other safari experiences - the awe-inspiring spectacle of 1.5 million wildebeest, zebras and antelopes crossing the Serengeti plains, in what naturalists the world over consistently rate as "the greatest wildlife show on Earth."