Lempuyang Luhur Temple
It's a very scenic and very holy place to visit. Located in east Bali within the highlands of Mount Lempuyang this temple is not only one of the most difficult to get to, but also one of the most sacred on Bali. 1,700 steps cut into the mountain are between your parking lot and the shrines. This means a 1 1/2 to 2 hours of physical challenge leading you uphill through the jungle.
Pura Luhur Lempuyang is like several other temples in this list one of Bali's most important religious places. Like Besakih, Tanah Lot etc it's also one of the island's nine directional temples with the function to protect Bali and the Balinese from evil spirits. It is also one of the six temples that are dedicated to the supreme God, Sang Hyang Widi Wasa. The six are the temples of the world, also called sad kahyangan.
The temple is never really crowded. So if you are fit and ready for a challenge that gives you a very special reward in return, this temple should be high up on your list of things to do on Bali.