Look at the oil spilled in the world's 2nd 'Best Place for Wildlife'

Decades of exploration and exploitation has led to severe contamination in the Pacaya Samiria National Reserve in Peru's Amazon

Walk into one of the many tour agencies in Iquitos, the biggest city in Peru's Amazon, and you'll hear many wonderful things about the Pacaya Samiria National Reserve. "Best place to see animals in their natural habitat," one guide says. "An abundance of parrots, paiche and monkeys, and all kinds of bird species," cries another.

"Pacaya-Samiria", as it's dubbed, extends for just over two million hectares and is the second largest of Peru's 170 "protected natural areas." In 2015 USA Today's travel website 10Best voted it the world's second "Best Place for Wildlife", losing out to Ecuador's Galapagos Islands. "Located near the Amazon headwaters in Peru," 10Best stated, "the reserve is home to some of the biggest wildlife populations in the Amazon."