I Gede Mugi Raharja
Bali island’s beautiful nature in Indonesia are the result of volcanic activity under the sea, more than 23 million years ago. The geology of Bali island lies in the Sunda mountains arc, part of the volcanic rings of Pacific ring of fire. This causes the condition of Bali island is often unstable in ancient times, due to the shocks of volcanic eruptions. One of the beautiful areas caused by ancient volcanic activity is the Caldera of Mount Batur. On the northwestern side of the caldera of the ancient Mount Batur, the archaeological traces of statues in sacred venues have been found since the prehistoric Balinese civilization. The holy place built on the hill at the highest peak of this ancient Batur Mountain caldera, often called Pura Penulisan. This holy place is designed in accordance with local wisdom, the concept of punden berundak, a concept of the original architectural space of Indonesia since prehistoric times. The shape of the architectural space design follows the topography of the hills, in form of leveled terrace and equipped with plaza. Archaelogical of Pura Penulisan merges with the caldera of Mount Batur, which was formed due to eruption 5,500 years ago. Therefore, Pura Penulisan architecture and the ancient Batur Mountain caldera, are both a valuable heritage, containing knowledge, and can knit memories.