Bromo Tennger Semeru National Park
The landscape, inside the Bromo Tennger Semeru National Park, is known as the Tennger Sand Sea of Tennger Massif. The Tennger was first a volcano, but a very huge eruption caused that the magma chamber collapsed and the Sand Sea Massif was formed. Out the Tennger Volcano, 4 new volcano's were born and the Bromo is one of them.