Welcome to the jungle. An Amazon River cruise will take you through some of the most astonishingly biodiverse landscapes in the world. Monkeys, sloths and tropical birds inhabit the trees, jaguars prowl the forest and manatees, dolphins and otters float through the river's murky waters. Most of the river ships that operate on the Amazon hold about 30 passengers, so you certainly won't feel crowded.
A river cruise in the Peruvian Amazon is all about nature. Unlike Brazil's Amazon region frequented by steel-hulled mega cruisers, Peru's upper Amazon requires smaller, more nimble, intimate vessels -- ideal for navigating the labyrinth of less-explored side streams leading into primeval jungles.