This is an amazing view of the heart of the Bromo-Tengger-Semeru National Park on East Java. It is the only conservation area in Indonesia that has a "sand sea", the Tengger Sand Sea (Indonesian: Laut Pasir Tengger), across which is the caldera of an ancient volcano (Tengger) from which four new volcanic cones have emerged. This unique feature covers a total area of 5,250 hectares at an altitude of about 2,100 m. On the background there is the highest mountain in Java, Mount Semeru (3,676 m).