Located in East Java, Indonesia, Kawah Ijen is a volcano is home to the largest acidic crater lake in the world. What turns the waters of the lake in the 1 km caldera its beautiful turquoise color are the highly sulfuric gases emitted from the volcano underneath.

바버렛츠 (The Barberettes) – Barbara Ann (Cover of The Beach Boys). The Barberettes is a South Korean retro, doo-wop female group that debuted in 2014 as a trio, and is based in Seoul.

Blue Man Group founders Phil Stanton, Chris Wink and Matt Goldman pose for a photo at the Blue Man Group's 20th anniversary reunion show to benefit The Blue School at the Astor Theater on April 13, 2011 in New York City.

Children with balloons play beside the statue of British comedy legend Eric Morecambe on January 16, 2012 in Morecambe, England. According to scientists January 16, 2012 was “Blue Monday”, the most depressing day of the year. (Photo by Christopher Furlong/Getty Images)

In this photograph taken on May 20, 2014 nine year old Indian boy Lakhan Kale is tied with a cloth rope around his ankle, to a bus-stop pole in Mumbai. The nine-year-old boy dressed in blue lay listlessly on the pavement in the scorching Mumbai summer afternoon, his ankle tethered with rope to a bus stop, unheeded by pedestrians strolling past. Lakhan Kale cannot hear or speak and suffers from cerebral palsy and epilepsy, so his grandmother and carer tied him up to keep him safe while she went to work, selling toys and flower garlands on the city's roadsides. (Photo by Punit Paranjpe/AFP Photo)

This young boy wrestled with his emotions at the National Children’s Sumo ­Tournament in Tokyo on July 30, 2012. (Photo by AP Photo/LaPresse)

Anne Hathaway arrives for the premiere of Twentieth Century Fox & Blue Sky Studios' “RIO” on April 10, 2011 in Hollywood, California. (Photo by John Sciulli/Getty Images)