If you have limited time in Bali, put Tanah Lot in your list. At least you visited here when you are in Bali. It is famous with the rock formation at the beach. At at the end, there is a temple. Tanah Lot Temple is one of the cultural icon in Bali and very ideal for the photographer.
I say describe Tanah Lot is very unique and beautiful place. The beach, the rocks, and the tree make it very priceless. In here, there is some called "Holy Water" for the Hinduism. The water came from the cave, most of the people took the water to their face and later the monk will bless you and putting some rice on your forehead.
Beside that, you can visit and see the "Holy White Snake". Make sure give some donation before you go see the snake. They said the snake had been thousand years. But what my friend told me, they can't see any snake. Only the dry skin of the snake.