Orlova Chuka (Орлова Чука in Cyrillic) is situated 45 km from Ruse and about 86 km from Veliko Tarnovo. It is one of the most interesting caves in Bulgaria. It was accidentally discovered by a shepherd named Stoyan Dimitrov in 1941.
The cave is formed by Cretaceous limestones deposited on the bottom of the ancient Sarmatian Sea. The cave galleries are formed much later as a result of karst processes occurred during the Quaternary.
Reportedly, skeletons of bears, spearheads, flint scrapers, axes, pieces of pottery have been unearthed, some dating back to the Eneolithic (Copper Age) and suggesting that the cave was inhabited by humans.