The Pobiti Kamuni (Fossil Forest) at Varna was listed in 1937. The "forest" comprises 300 stone columns between 0.7 and 5.9 m high and from 0.7 to 2.9 m in diameter. Most of the columns stand on their own; they are cylindrical in shape and hollow inside. Other columns are bound together by horizontal slabs of limestone and sandstone. Today the natural sights in Bulgaria are 479 and the total area is 14,548.63 ha.