I have been to Bali before but never to the northern end. They have some pretty major mountains and a volcano there. The water temple is on a lake at 1200 meters. The temples themselves are not accessible but they have a big platform where monks do a sort of brief pray-in, scheduled by a guy with a bell and a megaphone.
Also saw some massive waterfalls deep in the forest, and could swim there. Also at some natural hot springs. Water falling from high up is like a massage…
They also have a Buddhist temple, the only one on Bali and very large, which would be tranquil and serene if a tour bus hadn’t unloaded a herd of loud French tourists apparently working out the thing with taking off shoes in temples for the first time and having a ball of it.