2. Visit a temple

The majority on Bali is Hindu and the place to practice this belief is of course in a Hindu temple. These temples are everywhere on the island; from small ones just on the street, to bigger family temples, to village-sized temples. To come to Bali without looking at one of the big temples is a waste

Do Visit the Pura Besakih a.k.a. The Mother Temple
This temple is definitely the "mother" of all temples; it's located on the hill of Mount Agung and it is made up of courtyards with altars and shrines devoted to a number of gods. Take a guide there to show you around, but make sure you bargain about the price for it.