Pobiti Kamani, also known as The Stone Desert, is a desert-like rock phenomenon located on the north-west Varna Province border in Bulgaria. It is considered the only desert in Bulgaria and one of few found in Europe. The desert consists of sand dunes and several groups of natural rock formations on a total area of 13 km². The formations are mainly stone columns between 5 and 7 meters high and from 0.3 to 3 meters thick. The columns do not have solid foundations, but are instead hollow and filled with sand, and look as if they were stuck into the surrounding sand, which gives the phenomenon its name. Sandstorms and sand twisters have also been known to commonly occur in this desert region of Bulgaria.