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.

Dancers perform the traditional Kuda Lumping in Bogor, Indonesia early November 2022. They are said to enter a trance-like state as they perform, and often claim not to remember the dance once they awaken. (Photo by Sita Gramich/Solent News)

Residents make decorations mosque-shaped lamps to enliven the holy month of Ramadan in Pekanbaru, Riau Province on April 28, 2022. Muslims throughout the world are marking the month of Ramadan, the holiest month in the Islamic calendar, during which devotees fast from dawn till dusk. (Photo by Afrianto Silalahi/ZUMA Press Wire/Rex Features/Shutterstock)

An actor performs as a zombie during the “Train to Apocalypse” event at a Light Rail Transit (LRT) train station in Jakarta, Indonesia, 09 September 2022. The Indonesian capital's LRT operator modified train cars and stations into zombie apocalypse settings to promote the use of public transportations. (Photo by Mast Irham/EPA/EFE/Rex Features/Shutterstock)

Balinese children take part in a traditional mud bath known as Mebuug-buugan, a day after Nyepi – the “Day of Silence”, aimed at neutralising bad traits in Kedonganan village on Indonesia's resort island of Bali on March 23, 2023. (Photo by Sonny Tumbelaka/AFP Photo)

A protestor gestures during clashes with police during protests against planned fuel price hikes on March 27, 2012 in Jakarta, Indonesia. Thousands of Indonesians students in big cities all over the county gathered to protest the governments plans to increase the price of subsidized fuel by 30 percent. The Indonesian parliament is currently debating the fuel hikes which would go into effect March 25, 2012 if approved. (Photo by Ulet Ifansasti/Getty Images)

A worker throws a cloth during a drying process at Sukoharjo near Solo, Central Java province, Indonesia, April 23, 2019 in this photo taken by Antara Foto. (Photo by Mohammad Ayudha/Antara Foto via Reuters)