This is a unique conglomeration of stones that are shaped like humans, animals, various objects and mysterious beings. It is located on the western slope of the South Demerdzhi and is a natural landmark of national significance. There is a pillar by the name of Giant that is 25 m high with a diameter of 5 metres. It is surrounded by 10 to 20-metre-high posts and columns. The valley also has a rock called Yekaterina because of its resemblance to the face of Catherine the Great.