Pobiti Kamani, Protected rock formation in Aksakovo Municipality, Varna Province, Bulgaria

Pobiti Kamani is a protected limestone formation near Varna with vertical columns rising from the ground and forming a natural forest pattern. The pillars vary in height and diameter and are arranged in several natural groups spread across a large area, with some being hollow and filled with sand.

The stone formations originated roughly 50 million years ago when the area sat on the bed of an ancient sea during the Early Eocene period. After the sea receded, the columns remained as remnants of that distant marine past in the landscape.

The columns bear different local names reflecting their separate locations and distinctive features across the landscape. Visitors can observe how the pillars create distinct clusters with varying heights and widths, giving each section its own character.

The site is reachable from Varna either by public bus or by car along the old road toward Sofia. The visit requires some preparation as the area is exposed with little shelter from weather or sun.

Detailed study found no coral in the pillars, so the reef hypothesis was set aside. Petrographic and stable-isotope work instead links them to a paleo-hydrocarbon seep system: low-magnesium calcite cements strongly depleted in carbon-13, with fluid pathways recorded as columns in the sands. De Boever and colleagues studied this in 2009.