Bulgaria

Biserna Cave — Shumen

Location: Shumen · Shumen

Nature and mountains

Location: Shumen. Province: Shumen. Category: Nature and mountains.

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Biserna is a two-level karst cave with galleries arranged above one another. An underground river flows through its lower level, while stalactites, stalagmites and stone curtains illustrate the variety of limestone formations.

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Български туристически съюз

Reviewed on October 13, 2026

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Biserna Cave — Shumen

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