Mount Bromo, East Java Indonesia - Mount Bromo belongs to the Bromo Tengger Semeru National Park which it's located on East Java, Indonesia. Bromo is an active volcano that surrounded by the "sea of sand" and linked with valley and canyon which is the caldera of an ancient volcano. The background of the picture (below) is the Mount Semeru.
Photo taken by @sparcographics on Instagram
Here's the another picture of Bromo
Photo taken by @fatenabraham on Instagram
Article references : Wikipedia