Read the text and answer the questions.
 

    Pura Uluwatu is one of the famous tourist attractions on the island of Bali. It is a temple that is located on the edge of a steep cliff, about eighty metres above sea level at the southern part of Bali.
    Pura Uluwatu is very famous and it is one of the six main temples existing in Bali. People come to Pura Uluwatu not only to see the remarkable temple, but also to enjoy the beautiful scenery and the sunset.
    Visitors are warned to keep an eye on their belongings since the monkeys there are quite aggressive. They may take the sunglasses and cameras you bring.
    People suggest visiting the temple during weekdays and before the sunset since it will be the best time to enjoy Pura Uluwatu. At that time, the place is not too crowded, so visitors can have more time to explore the temple. The visitors can also watch turtles and dolphins in the sea at this time.

How many main temples are there in Bali?