Ulun Danu Beratan Temple, a temple dedicated to the goddess of the lake is Ida Batari Dewi Ulun Danu on the edge of a huge crater. The dominant shrines are Meru’s (pagodas) dedicated to the lake goddess and the gods of Mount Batur and Mount Gunung Agung, the largest volcano in Bali. Ulun Danu Beratan Temple was built in the 17th century in worship of the main Hindu trinity, Brahma-Vishnu-Shiva, as well as the lake goddess, Dewi Danu. The sight and cool atmosphere of the Bali uplands have made the lake and Ulun Danu Temple a favourite sightseeing and recreational spot as well as a frequently photographed site. Ulun Danu Beratan Temple, literally ‘the source temple of Lake Beratan’, is easily the island’s most iconic sanctuary sharing the scenic qualities with the seaside temples of Uluwatu Temple and Tanah Lot Temple. The smooth reflective surface of the lake surrounding most of the temple’s base creates a unique floating impression, while the mountain range of the Bedugul region encircling the lake provides the temple with a scenic backdrop.
The history of the Ulun Danu Beratan Temple can be traced back to the rise of the Mengwi kingdom. Ulun Danu Beratan Temple mostly called as a Ulun Danu Temple but not to be confused with Ulun Danu Batur Temple, which is on the rim of the caldera at Batur Lake. The name of Ulun Danu Beratan Temple is taken from the lake where the temple is built at Beratan Lake. The name of Beratan Lake is inseparable with the Beratan Mount as Deity and Goddess as fertility source, prosperity to keep the prosperity in life and society life. In Papyrus Chronicle of the Mengwi is elaborated by the history of Ulun Danu Beratan Temple founding together with existence of the Mengwi Empire. Therefore its status is pertained with the secondhand of Temple Empire what is usually pertained as Dang Kahyangan. It is the same to the description in papyrus of Usana Bali and Padma Bhuwana, hence Puncak Mangu Temple where the Panyawangan (representative place to worship) is the Ulun Danu Beratan Temple. So it is called by entire Balinese residents as Kahyangan Jagat (The Biggest Group of Hindu Temple in Bali
It is especially important for the Balinese. Only here can you get holy water of a particular variety. The water is collected from the lake itself, directly in front of the temple. Visitors have to wear a sash and not go near. Bathing is forbidden. The lake is the ultimate source of water for the rivers and springs that irrigate central Bali. It is therefore of the utmost importance. Ulun Danu Temple priests say that the lake is fed by springs located at each of the wind directions. Each of the springs is the origin of water for that particular region of central Bali. So, farmers from North Bali collect their holy water from the northern spring of the lake and so on. Ulun Danu Beratan Temple lies by the western banks of Lake Bratan in the Bedugul Highlands at a level of 1239m, is one of the most picturesque and most photographed temples in Bali. Ulun Danu Temple is inside the caldera of the now extinct volcano Gunung Catur. It is one of the main sources of irrigation in the Balinese highlands.
The ‘floating’ temple complex is comprised of four groups of shrines, including the prominent Lingga Petak shrine to its east. There are four gates facing each of the four points of the compass. Ulun Danu Beratan Temple is consisted of 4 temples complex that are: Lingga Petak Temple owns the function to worship the Siwa God Penataran Pucak Mangu Temple is referred this gate as Parhyangan ri pinggiring rawa Beratan or Danu Beratan Temple is founded by I Gusti Agung Putu to worship the Hyang ing Parwata or Deity which is placed in Pucak Mangu that is Bhatara Hyang Danawa as according to papyrus of Padma Bhuwana and Usana Bali, because Mangu Mount is located in north direction, hence it is called the Bhatara Hyang Danawa or Wisnu God Erate Bang Temple is functioning to worship of Brahma God Dalem Purwa Temple is functioning to worship of Danu Goddess which is considered to be miraculous of the Bhatara Hyang Danawa or Laksmi Goddess. Ulun Danu Beratan Temple Ceremony
The temple ceremony which is executed every six-month (210 days) that on Anggara (Tuesday) Kliwon Julungwangi (Base on Balinese Hindu calendar). Every 12 months (420 days) is executed by the bigger ceremony from the ordinary ceremony, so-called Piodalan Agung Pakelem ceremony is executed at any times as according to situation and condition. The Pakelem ceremony owns the function to worship the supremacy and also cheapness of the infinite for award of life, fertility, prosperity, as impact of the existence of ecosystem balance so that give the benefit for life and universe life forever and ever, during Beratan Lake and Beratan Mount stand up