<p>Pobiti Kamani (Bulgarian: Побити камъни) is a rock phenomenon located in Varna Province, Bulgaria. The formations are mainly stone columns between 5 and 7 metres high and from 0.3 to 3 metres thick.
The columns do not have solid foundations, but are instead hollow and filled with sand, and look like stuck into the surrounding sands, which gives the phenomenon's name.
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Have a look at <a href="https://en.wikipedia.org/wiki/en:Pobiti_Kamani" class="extiw" title="w:en:Pobiti Kamani">the articte in wikipedia</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/7474114@N06">Juha-Matti Herrala</a> from Seinäjoki, Finland
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/7474114@N06/2242489503/">Pobiti Kamani _ 3</a>