When picturing the Brazilian Amazon, one immediately thinks of a vast tropical environment that is home to countless varieties of flora and fauna, not to mention the source for roughly one-fourth of the world's fresh water. What one may not think of is a metropolis of more than 1 million people, but that is exactly what Manaus is.

The port city of Manaus is located in the heart of Brazil's Amazon Basin. While it is a large city, it is accessible only by riverboat or airplane.