Gunung Leuser National Park is a national park covering 7,927 km² in northern Sumatra, Indonesia, straddling the border of North Sumatra and Aceh provinces. The national park, named after Mount Leuser (3,381 m), protects a wide range of ecosystems. An orangutan sanctuary of Bukit Lawang is located inside the park. Together with Bukit Barisan Selatan and Kerinci Seblat national parks it forms a World Heritage Site, Tropical Rainforest Heritage of Sumatra.

“Hi! I'm Joel, I live in a valley in British Columbia's Rocky Mountains, as close to the forest as I could possibly be! I love to run, bike, jump, eat and create and I hope that you enjoy my work as much as I enjoy creating it!” – Joel Robison. (Photo by: Joel Robison; Source: Flickr)

A model gets ready backstage during the Tbilisi Fashion Week in Tbilisi, Georgia, on October 27, 2017. The presentation of the Spring/Summer 2018 collections runs from 27 to 30 October. (Photo by David Mdzinarishvili/Reuters)

A businesswoman Maha Shalaby paints ostrich eggs in Cairo, Egypt November 27, 2016. (Photo by Mohamed Abd El Ghany/Reuters)

A worker works at a plant of Hyundai Motor in Asan, South Korea, January 27, 2016. (Photo by Kim Hong-Ji/Reuters)

A man dressed as Santa Claus sits at a bus stop before an annual race in Belgrade, Serbia December 27, 2015. (Photo by Marko Djurica/Reuters)

A participant takes part in a “Zombie Walk” parade in Kiev, Ukraine on October 27, 2018. (Photo by Gleb Garanich/Reuters)

A Fulani woman fixes her head scalf on the street of Dapchi, Yobe state, Nigeria on February 27, 2018. (Photo by Afolabi Sotunde/Reuters)