Csodabogyós Cave is one of Hungary's most impressive underground systems - the longest cave on the Keszthelyi Plateau and the eighth longest in the whole country, stretching an astonishing 6,400 metres with a depth of 147 metres. This is a destination for those seeking a genuine caving adventure rather than a simple sightseeing stroll.

Formed mainly by tectonic movement, the cave is a multi-level network of fissure passages, chambers and shafts cut through Upper Triassic limestone. Bell-shaped fissures split and widen as they descend, some reaching depths of 50 metres, while collapsed debris connects the various chambers. In sections known as the Hanging Garden and Fairyland, visitors find hundreds of stalactites and 50-60 striking stalagmites up to 1.5 metres tall, alongside rare curling helictites, fault-polished rock faces and patches of white moonmilk. Many of these formations are still actively growing today.

How to get there

• Balatonederics — the sealed entrance lies in a wooded, rocky hillside at 395 m elevation, northeast of the Ederics-hegy summit; access only with an authorised guide
• Located about 100 metres from the entrance of the neighbouring Szél-lik cave, with which it shares an air circulation system

Practical information

• Strictly protected cave — visiting the undeveloped sections requires permission from the Balaton Uplands National Park Directorate
• Tours require overalls and are guided, suitable for building caving skills and technique
• Closed during winter while bats hibernate
• Ladders are installed in places, but the terrain still demands reasonable fitness

The cave takes its name from the bittersweet nightshade (csodabogyó) growing near the entrance, marking the northernmost known occurrence of this plant.