Mount Agung is an active volcano located in Bali and why would you pass up a chance to hike an active volcano? The far most popluar option is to hike this volcano with a guide for sunrise. You will join a large group to hike to the summit. Definitely wear good shoes or hiking shoes as the terrain is very slippery. The best time to visit is during the dry season when there is not much cloud coverage. All tour offices in Ubud, Canggu or anywhere else will offer this tour to you so make sure to scout for the best prices.