“When We're Gone... Memories Of Us Are All That Remain”, 2011. (Photo by: Trini61; Source: Flickr)

A Bedouin rifleman hides behind his camel while he carefully takes aim in the Sahara desert. (Photo by Three Lions/Getty Images). Circa 1955

Pig Felix of physiotherapist Daan Vermeulen lies amid elderly people in a senior care facility on April 12, 2011 in Gelsenkirchen, Germany. (Photo by Ralph Orlowski/Getty Images)

A protester holds a poster displaying the message “Get away UK” during an anti-British demonstration in the Iranian capital that resulted in a break in at the British Embassy on November 29, 2011 in Tehran, Iran. (Photo by FarsNews/Getty Images)

A model presents a creation by Versace during the Milan Fashion Week in Milan, Italy on February 22, 2019. (Photo by Alessandro Garofalo/Reuters)

Dancers from Kyiv and Dnipro preparing themselves in the wings for a performance at the Kyiv National Opera House on June 24, 2022. (Photo by Julian Simmonds/The Guardian)

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.