Meet the marvelous and acutely endangered orangutans in the Gunung Leuser National Park, situated in northern Sumatra. Sprawling over 950,000 hectares, this UNESCO-recognized national park is one of the world’s most biologically diverse conservation areas, which is home to some of the most threatened and exotic species, such as tigers, elephants, rhinos and orangutans. However, orangutans have been one of the key highlights and you are certain to come across these affable primates in the park interiors. Apart from the gentle orangutans, sightings of the amusing white-breasted Thomas Leaf monkeys are common as they are easily recognized by their bizarre punk hairdo. Gunung Leuser is also home to almost 300 exotic avian species, most notably the rhinoceros Hornbill, helmeted Hornbill and woodpeckers. Apart from being a safe sanctuary for these magnificent creatures, this park also protects the tropical rainforest of Sumatra, which makes it a must-visit for any wildlife buff.