The stone forest is just a few miles west of Varna. There’s a number of theories as to how it was formed (it is not a petrified forest), but the prevailing theory, and the one that makes the most sense to me, is that the area used to be a huge cave that eroded around the stalactites and stalagmites of the cave. The whole area around the immediate area is sand, but surrounding that is forest.

More photos in my Stone Forest, Bulgaria Flickr set.