Source - Wikipedia and photos were taken by my husband
Mount Batur in Kintamani (Gunung Batur) is an active volcano located at the center of two concentric calderas north west of Mount Agung, Bali, Indonesia. The south east side of the larger 10×13 km caldera contains a caldera lake. The inner 7.5-kilometer-wide caldera, which was formed during emplacement of the Bali (or Ubud) ignimbrite, has been dated at about 23,670 and 28,500 years ago .
The first historically documented eruption of Batur was in 1804, and it has been frequently active since then. The substantial lava field from the 1968 eruption is visible today when viewed from Kintamani, a town that stradles the southwest ridge of the greater caldera.
The lake, Danau Batur, is the largest crater lake on the island of Bali and is a good source of fish.
A climb to the summit of Mount Batur - 1,700 metres and still an active volcano - to watch the sunrise is a great experience for more energetic travellers. This is an easy climb of about 2 hours, and local guides abound. You do not need to be in peak physical shape to complete this trek. Which parts of the mountain are safely accessible change according to local volcanic activity.