Guanacos sit during a signing ceremony in Patagonia Park, Chile, January 29, 2018. Chilean President Michelle Bachelet signed decrees Monday creating vast new national parks using lands donated by U.S. conservation organization Tompkins Conservation in what is believed to be the largest private donation of land ever from a private entity to a country. (Photo by Esteban Felix/AP Photo)

A model presents a hairstyle creation by stylist Flavia Attard Borg during the Malta Fashion Awards, the climax of Malta Fashion Week, in Valletta, Malta on May 31, 2019. (Photo by Darrin Zammit Lupi/Reuters)

The ruins of a castle stand above the town of Rocca Calascio, close to Santo Stefano di Sessanio in the province of L'Aquila in Abruzzo, inside the national park of the Gran Sasso e Monti della Laga, Italy, September 7, 2016. (Photo by Siegfried Modola/Reuters)

Tribesmen loyal to the Houthi movement perform the Baraa dance during a gathering to show support to the movement in Sanaa, Yemen, May 19, 2016. Bara or Baraa dance is one of the several traditional outdoor dances performed by men in the country of Yemen. Bara dance literally means a dagger dance, where each dancer holds a dagger. The style of the Bara dance differs from tribe to tribe. It is performed on special occasions. (Photo by Khaled Abdullah/Reuters)

A model presents a creation from the fashion label Kakopieros during Australian Fashion week in Sydney, Australia, May 20, 2016. (Photo by David Gray/Reuters)

Two horses fight during a Xinhe Festival in Peixiu Village of Antai Township in Rongshui Miao Autonomous County on July 11, 2016 in Liuzhou, Guangxi Zhuang Autonomous Region of China. Xinhe Festival is one of the most popular traditional festivals in Rongshui with various entertainment activities. (Photo by VCG/VCG via Getty Images)

A vehicle lies on a road in Adairsville. (Photo by David Goldman/Associated Press)

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.