An international expedition will seek signs left by an ancient civilization in the prehistoric sanctuaries of Belintash, Tatul and Harman Kaya in Bulgaria's Rhodope mountains.
The team of researchers includes Professor Ana Raduncheva from the Archaeological Institute at the Bulgarian Academy of Sciences, archeoastronomer Robert Bauval, geologist Dr. Robert Schock and NASA astrophysicist Thomas Brophy.
They will explore the traces of a civilization that inhabited Bulgaria's land 8000 BC in the region of the Eastern Rhodopes.
Their work will be filmed and will show for the first time the mysterious Stone Forest in the Eastern Rhodopes.