Dawn breaks in the Brazilian rainforest, as the sun rises the mighty Amazon stirs to the sound of birds, monkeys and insects; there’s no need for alarm clocks here, the awakening jungle is the ultimate wake-up call. Catching a glimpse of a rare pink river dolphin is sure to revive the most bleary-eyed explorer as you follow the river inland to Manaus, some 1,000 miles from the ocean and the furthest navigable port along its banks.