Natural phenomenon

When you see Karlukovo, near Lukovit, for the first time, you'd be hard put to believe that you are in the part of Bulgaria richest in karst rocks. The settlement lies among low, monotonous hills and there's nothing – not even a signpost pointing to a tourist sight to indicate that underneath this modest landscape lies a labyrinth of caves. It is the result of thousands of years of action by wind and water, which carved the pliable karst rock and formed caves, magical shapes and whirlpools.

Viktor Teplyakov, a "special missions officer" in the Russian army during the Russo-Turkish War of 1828-1829, abruptly reined in his horse at the sight of the six stone pillars. Huge in size, they emerged from the sandy, shrub-covered wilderness by the village of Gebedzhi, now a town called Beloslav, near Varna. Being a true child of the Romantic age, he was stunned. He wanted to dismount and look over the strange stone pillars. But Colonel L., who was leading the march, had no time to waste.