Hi, Nung Nung Falls are less well known than some others but are quite spectacular. From Sangeh go north through Petang to a village of Pelaga. There you will find a sign to Air Terjun on the left but pointing you along a road to the right. It is a short distance to the parking area, then you walk down many steps (over 400 I think). The main falls have a long drop - I think as high as any I have seen in Bali, and usually a large volume of water coming over. I am not sure how you would go getting 360 degree views - but go and have a look
There is a description at
Nungnung Waterfall, Bali | Adventure Indonesia | Indonesia Beautiful Place, but his map is a bit misleading. Firstly he goes up through Mengwi to Luwus, then takes a connecting road accross to the road from Sangeh to Petang - that connecting road can be a bit hard to find and is currently in poor condition. Then at Pelaga he shows the route as doubling back a bit - but that does not happen.
At the top there is a car park area, then a bit further down another area where motorbikes can park. Here there is a warung with cold drinks etc, and they can serve coffee luwak by the cup or sell you 500 gram packs of it. They say their coffee luwak is collected from the wild in that area and will be happy to talk to you about it.