It is definitely not the highest peak among the other mountains in Indonesia, but Bromo remain one of the best known and one of the most visited attraction in east java, belongs to Bromo-Tengger-Semeru National Park. The volcano sits inside massive Tengger caldera. Approximately 10 km in diameter, surrounded by fine volcanic sand. Known as Laut Pasir (Sea of Sand) by the locals or Segara Wedi in Javanese.

The temperature in Tengger caldera often around 10 C at night but it can drop to 0 C and below at times. Daytime temperatures are usually quite pleasant around 15 C to 20 C. However, if it is cloudy or windy, it can be quite cold, so bring warm wind-proof and water-proof jackets and proper shoes. The rainy season is from November to March with January and February being the heaviest, many parts of the park are inaccessible due to flooding and landslides during this time.

The name of Bromo derived from Javanese pronunciation of Brahma, the Hindu creator god. Following the Hindu ritual origin in the 15th century legend. On the fourteenth day of the Hindu festival of Yadnya Kasada, the Tenggerese people of Probolinggo, East Java, travel up the mountain in order to make offerings of fruit, rice, vegetables, flowers and sacrifices of livestock to the mountain gods by throwing them into the caldera of the volcano.

The contra between the lush green valleys all around the caldera and the wide sea of sand somehow gave an unsettling and unearthly effect yet incredibly magical and breath taking.