Bulgaria - Pobiti Kamani Natural Monument

"Pobiti Kamani ("upright stones" - fossil forest) are calcareous columns formed by natural forces. They exist at an astonishing scale. The Monument is comprised of smaller and bigger stone groups distributed in 8 km long belt with South - North direction in the region of Varna, along the northern Bulgarian Black Sea coast. The stone columns vary in size - up to 10 m height and up to 2, rarely 6 m diameter. Some of them are solid, when others are hollow. . The calcareous material is pale grey sandstone with carbonate content. Some of the columns have been eroded by wind and water into fantastic forms. The desert like environment surrounding the columns possesses specific flora and fauna."
Source: UNESCO World Heritage Tentative List

The Stone Forest near Varna. Thanks to Lilia of Bulgaria.