A member of the Community Police of the FUSDEG (United Front for the Security and Development of the State of Guerrero) poses with a weapon during events to mark the first anniversary of the force's operations in Ocotito, January 23, 2015. Based on the traditional indigenous justice system, the Community Police is made up of volunteers from different communities of Guerrero, and was created in response to the spate of violence in several locations in the state. (Photo by Jorge Dan Lopez/Reuters)

On the western side of Mount Hood lies the longest glacier cave system in the contiguous United States. In 2012, these caves were mapped to a combined length of 7,166.8 feet by cave explorers Brent McGregor and Eddy Cartaya. Currently, the total passage length is hundreds of feet less. Glaciers are frozen rivers; they are always moving and changing... (Photo and caption by Josh Hydeman)

From Manhattan and Brooklyn's trendiest neighborhoods to the far-flung edges of theouter boroughs, Will Ellis has spent the last three years photographing and researching the lost and lonely corners of the United States' most populous city. His photo book Abandoned NYC is packed with 150 color images of sixteen of New York's most beautiful and mysterious abandoned spaces, paired with detailed essays on the fascinating history of these forgotten sites. Here: Letchworth Village is located just an hour's drive from NYC in Thiells, NY. It was founded in 1912 to house the city's developmentally disabled as a ”state institution for the epileptic and feeble-minded”. (Photo by Will Ellis)

A Felix Airways plane is seen after it was destroyed by an airstrike at the international airport of Yemen's capital Sanaa, April 29, 2015. Jets from a Saudi-led alliance destroyed the runway of Yemen's Sanaa airport on Tuesday to prevent an Iranian plane from landing there, Saudi Arabia said, as fighting across the country killed at least 30 people. Airport officials said the strikes set a civilian aircraft operated by Yemeni Felix Airways ablaze. (Photo by Khaled Abdullah/Reuters)

Part made cricket bats sit in a box at the Salix Cricket Bat Company in Langley, Britain July 6, 2015. Salix Cricket Bat Company use traditional tools and techniques to make cricket bats by hand. (Photo by Neil Hall/Reuters)

An approximately 8 year-old male orangutan named Siamang reacts under the influence of tranquilizer as it's being prepared to be released into the wild at a rehabilitation center in Kuta Mbelin, North Sumatra, Indonesia, Friday, July 10, 2015. The orangutans at the center were mostly rescued from palm oil plantations or confiscated from homes where they were kept as pet animals. Orangutan populations in Indonesia's Borneo and Sumatra island are facing severe threats from habitat loss, illegal logging, fires and poaching. Conservationists predicted that without immediate action, orangutans are likely to be the first great ape to become extinct in the wild. (Photo by Binsar Bakkara/AP Photo)

A devotee covered in motor oil poses for a pictures during celebrations honoring the patron saint of Managua, Santo Domingo de Guzman, in Managua, Nicaragua August 9, 2015. (Photo by Oswaldo Rivas/Reuters)

An adult specimen of Nannospalax (leucodon) montanosyrmiensis, a variant of the lesser mole-rat (Spalax leucodon) is pictured near Albertirsa, some 60 kilometers southeast of Budapest, Hungary, 12 May 2018. The critically endangered rodent lives in several isolated populations in the Carpathian Basin. (Photo by Sandor Ujvari/EPA/EFE)