These are silhouetted scenes of a volcano in Bali, Indonesia, called Mount Batur. They are long shots, based on photos taken from a distance, with the dark volcano contrasted against a white cloudy sky.
You might also like Silhouettes of palm trees: Tall palm trees silhouettes or Coconut Trees Silhouettes
Or check out the many different type of silhouettes on this blog, like Silhouettes of birds in flight or Temple Silhouettes and Church Silhouettes. There are a lot of silhouettes of people, men and women, engaged in different activities and also silhouettes of objects. Check out all the Silhouettes .