Pura Besakih, Besakih
Concierge.com's insider take:
The most sacred site in Bali, Pura Besakih (on Mount Agung's slopes) is a sprawling complex of many separate shrines and compounds arranged on seven terraces. It's divided into three parts, one painted black for Vishnu, one white for Shiva, and one red for Brahma. Besakih is an active spiritual center, with many Balinese coming here to get holy water for ceremonies in their home villages. The 1963 eruption of Gunung Batur damaged much of the temple area, but happily, most of the damage has now been repaired.