This spectacle is only visible at night since daylight overpowers ... At the summit of Kawah Ijen lies a surreal turquoise ...

If the crater lake's extremely acidic waters weren't eerie enough, Kawah Ijen also emits sulfurous gases ... but create an astonishing spectacle at night. Often, the sulfur in these gases ...

Kawah Ijen Crater Lake is green because of the hydrochloric ... At times they work at night under the eerie blue light to escape the heat of the sun, and to earn extra income, Grunewald said.

The latter is immediately associated with its intense red color, especially spectacular at night. However ... One of them is Kawah Ijen, and in its crater, it houses a lake of a unique turquoise color ...

It encompasses Mount Ijen, a stratovolcano with a picturesque turquoise crater lake known as Kawah Ijen, which is the most acidic ... This phenomenon is observable only during night-time due to the ...

A DEADLY volcano that spits bright blue lava contains the world's largest acid lake - capable of melting human skin. Kawah Ijen ... the volcano's flames, the Ijen's crater lake's blue-green ...

1 of 14 Sunarto, 41 years old, carries a load of sulfur out of the Kawah Ijen crater ... which can only be seen at night. Its half-mile turquoise crater lake takes on an eerie glow in the darkness.